Hi KatieF and welcome to flyertalk!

There already is a fairly recent thread on this topic so I am going to move your post there, where you should find a good deal of relevant information.

In addition to that thread, here is another one that also looks like it might be helpful:

Best superluxury resorts in Caribbean/Central America?

Please report back if you try someplace new!

RichardInSF, moderator, luxury hotels and travel