That's kind of like saying, "which is best: Chocolate or Vanilla?" Personally, I like Pralines and Cream.
Your best bet is to look at the pictures -- both here and on other website, and read reviews of the resorts. Figure out what style appeals to you (and your SO.) Then go there, and don't look back.
We have been to all 4 (stayed at 3, and visited 1) and while we have definite "favorites" they're not the same as other people on this MB. We all go to different places for different reasons.
One thing, however, that must be said: If you are looking for glitz and marble you're not going to find it at Couples. What you WILL find is fabulous service, marvelous food and an atmosphere like you've never experienced.
Ragnar Relay 2014 - MIAMI to KEY WEST!
Marine Corp Marathon: 10/12 4:09
NYC Marathon 11/6/11 - 4:21
Chicago Marathon 10/10/10 - 4:19
Marine Corp Marathon '09 - 4:26 / '08 - 4:28[/FONT]