A cruise sounds like something you'd like. Guess where we're just back from? :) 9 days, Bermuda, Bahamas on Explorer of the Seas, from Royal Caribean. It was a blast, and definitely as relaxing or not as you want. I also found the planning to be incredibly simple.

For good prices, especially if you can plan short-notice, check out www.travelzoo.com . They have a lot of packages to all sorts of places. Or, heck, use a travel agent, put them to work. :)