Romance and cruising would seem to go hand in hand, particularly if you've spotted any of the cruise lines' glossy magazine advertisements: photos of couples admiring the bow at sunset, or sipping orange juice on their private verandah in terry clothes robes, or evenand this one we have a hard time believingspending time alone on a deserted beach with their mega-ship anchored in the background.

Advertisements notwithstanding, however, cruising can be one of the most romantic vacation options, but often it's the tangiblesonboard ambiance and lifestylethat are more likely to contribute to the feeling of "amore" than an occasional sunset. Choosing the right cruise line and, even more specifically, the right ship within the fleet, can be a big challenge.

In researching our top picks, we primarily called on our own experiences of romantic voyages. Whether your definition of romantic is a party-all-night ship or ultimate pampering and luxury, you'll identify with the criteria we have used in evaluating the best choices. For instance? A cozy cabin with a great bathroomand a private verandahis an absolute necessity. We prefer dining a deux (or at least the option to eat when and with whom we choose). Lounges with soft lighting are nice. And one more? Almost-private open-deck spaces for star gazing.

Carnival Cruise Line

Best Ships: Spirit-class vessels, including Carnival Pride, Carnival Legend and Carnival Miracle

Why: At 88,500 tons and with 2,124 passenger capacities, these ships are big enough to offer plenty of onboard varietybut not so huge that they feel impersonal. Plus, because these ships have a high balcony ratio, it's easyand not at all expensiveto nab a cabin with your own verandah. The ships are, for the exuberantly-designed Carnival, the fleet's most elegant, featuring an Art Deco scheme.

Stay Here: If you're splurging, the "penthouse suite" comes with a huge balcony and elaborate bathroom. The more affordable standard verandah cabins are pleasant, though.

Out on Deck: Go forward on Atlantic deck to the enclosed portion of the ship's exterior promenade.

Indoor Romance: Try a couples' massage at Spa Carnival. The foyer lounge and the cigar bar are the most intimate drink spots.

Dining: Bypass Carnival's assigned dining scheme at its main restaurants and head to the Spirit-class ships' reservations-only supper clubs.

Special Events: Spirit-class ships have wedding chapels (though captains are not allowed to perform ceremonies), and staffers will help arrange weddings and vow renewals.


Crystal Cruises

Best Ship: Crystal Serenity

Why: In general, Crystal is the best choice for folks who want big-ship features and small-ship luxury. In particular, while this newer ship offers many of the same features as Crystal Symphony does, the penthouse suites, the most romantic accommodations, are more plentiful.

Stay Here: The aforementioned penthouse suites, which come in three categories. All have verandahs, butler service and marble baths with Jacuzzi tubs (not to mention state-of-the-art tech toys), and are roomy enough for in-room massages. Another plus? Passengers in these staterooms can order off the menu from Crystal Serenity's fabulous specialty restaurants.

Out on Deck: Head for any of the terraced decks on the back of the ship.

Indoor Romance: Head for a private corner of the Sunset Bar (at the forward end of the Palm Court)it's a great spot for sunset-watching. We also love the clubby-pubby Avenue Saloon.

Dining: Try any (or all) of Crystal Serenity's specialty restaurants, such as the Northern Italian Prego and the Asian Silk Road. Or indulge in course-by-course room service on your verandah.

Downside: Crystal still maintains a set-time, assigned-tablemates scheme in its main dining rooms.

Special Events: No weddings but the ship does offer vow renewals.


Norwegian Cruise Line

Best Ships: Norwegian Dawn, Norwegian Star and Pride of Aloha

Why: First and foremost, NCL's "Freestyle Dining" philosophy, in which passengers can dine without the hassle of assigned times and tablemates at a variety of restaurants, is perfectly suited to table-for-two travelers. The variety of eateries is best on Norwegian Dawn and Norwegian Star (and, we presume, on the soon-to-be-launched Norwegian Jewel), but there are still plenty of options on Pride of Aloha (an older ship).

Stay Here: We love the mini-suites on Norwegian Dawn and Norwegian Starbeautifully decorated, with three-part bathrooms, totally separate living and sleeping areas (via a curtain), and lovely balconies. Even better: Consider a splurge on one of the Garden Villas.

For romantic quarters on Pride of Aloha we recommend you upgrade to suite accommodations (the tiny standard balcony cabins are pretty basic).

Indoor Romance: On Norwegian Dawn and Norwegian Star, try dinner at Cagney's, the ship's steakhouse and Le Bistro, the French eatery decorated with the NCL owner's personal collection of Impressionist masterpieces. On Pride of Aloha, we love the Plantation Club.

Onshore: Itinerary-wise, Pride of Aloha wins hands down. What is more romantic than Hawaii?


SeaDream Yacht Club

Best Ship: Either of its two nearly identical 4,260-ton, 110-passenger yachts (SeaDream I and SeaDream II)

Why: These ships win top romantic honors for sophisticated couples who want luxury (phenomenal dining and great service) amidst a casual ambiance. The ships are gorgeously restored; dining is all as-you-wish; cabins, though cozy, are outfitted with state-of-the-art accouterments; and last but by no means least, service is outstanding, personable, attentive ... and subtle. They're all-inclusive, too, which means tips and all drinks (not to mention unlimited caviar) are included in your fare.

Stay Here: There are only three types of stateroom. The most romantic is, of course, the owner's suite (with a fabulous windowed bathroom). The Commodore Club suite is basically two standard cabins put togetherwe actually preferred our standard accommodations. These 195-square-ft. staterooms feature separate seating areas and bedrooms, with a small but exquisitely outfitted bathroom (huge shower-for-two with three shower heads). Add to that fine linens and great mattresses on the bed, high-tech flat-screen televisions, DVD and MP3 players, and plenty of storage space.

Out on Deck: Our favorite place for sunset-timed port departures was on one of the Balinese beds on the top-most decktucked around the smokestack, they are built just a bit above the deck railing, which gives you a sense of floating above the water. We also loved the Top of the Yacht bar.

Dining: There are two primary venues. The Main Dining Salon (indoors) feels like a restaurant at an elegant, small boutique hotel. But our favorite spot was the Topside Restaurant, and most meals, from breakfast to dinner, were offered here; it's an open-sided outdoor eatery (covered, though, so shaded) and there are a handful of wonderful and private nooks.

Downside? There are no cabins with balconies (but the open decks were so expansive and there were so many lovely nooks that we never missed it).


Princess Cruises

Best Ships: Diamond Princess and Caribbean Princess, the line's newest Grand-class vessels.

Why: These vessels, measuring 113,000-plus tons and accommodating between 2,670 (Diamond Princess) and 3,100 (Caribbean Princess) passengers, are best for those in search of an affordable, big-ship experience with divinely romantic touches. Both offer the usual frenzy of activitiesonboard and offand the combination of open-seating dining, romantic (and amazingly cozy) public spaces, and the fabulous "Movies Under the Stars" feature is quite conducive to fostering togetherness.

Stay Here: These ships boast a high percentage of suites and mini-suites (which means booking a bigger cabin may not be too much of a splurge). The "piece de resistance" is the Grand Suite, which features separate sitting area, balcony that stretches between living room and bedroom, and a fabulous whirlpool tub. But even the standard mini-suite is charming and comfortable.

Out on Deck: On Caribbean Princess, "Movies Under the Stars," is like a retro drive-in where you recline on padded loungers (you can snuggle under the wool tartan blankets).

Indoor Romance: On Diamond Princess, check out the cozy Wake View Bar. On both ships we love the dark, mahogany ambiance of the Wheelhouse Bar.

Dining: Open-seating (as well as traditional) dining is available. But the most romantic optionand unique to cruisingis the Ultimate Balcony Dining dinner experience. For $50 per person, couples are treated to a lobster dinner with champagne and course-by-course service. Only caveat: Your cabin must have a balcony.

Downside? While the ship's deluxe mini-suites are lovely and comfortable, the all-open-air balconies (applies to any cabin on Dolphin deck) are anything but private.

Special Events: These ships are premier options for onboard weddings. Both have dedicated wedding chapels and captains empowered to perform ceremoniesand friends at home can watch live via Web cams!