Celebrity ships hold the top four prestigious spots in the 2006 Condé Nast Traveler's annual readers' survey ranking "The Best Cruise Ships in the World."

The highest ratings go to the line's larger Millennium class ships -- Millennium, Summit, Infinity and Constellation -- which feature a world-class specialty restaurant, spa cuisine at breakfast and lunchtime, and luxurious staterooms and suites.

But the new emphasis at Celebrity is on smaller ships.

Already the only major cruise line to call on the Galapagos Islands with the Celebrity Xpedition, the cruise line is in the process of introducing two new small ships -- Celebrity Journey and Celebrity Quest -- focused even more closley on individual service, offering a more intimate way to experience an array of exotic destinations and exclusive excursions.