Carnival’s ultra-luxury brand is in transition. Its three smaller ships have been sold to Windstar – Pride left the fleet in 2013 and Sprit and Legend depart next year. The remaining three ships – Odyssey, Sojourn and Quest – must wait until summer2016 before they are joined by a slightly larger sister being built by Fincantieri in Italy. Top-notch personal service is a Seabourn hallmark, suites are spacious, and the public rooms are coolly elegant. Drinks and gratuities included.