We just got back from Key West. It was pretty awesome and we went pretty wild with dinners and drinking and everything as well as stayed at one of the nicer hotels. all in all we spent ~$2500 for both of us including airfare. Granted it is considered the "off season" when we went, just be aware that if you are looking for bang for your buck, a honeymoon pieced together yourself may be the way to go. There is no way that you could eat and drink like we did, as well as do things like snorkling and charter fishing for the $2500 total that we spent, at an all inclusive resort.