Well I suppose the GF is closest, but I am going to take the advice on the solo board and check out Spa at the Disney Institute, which I now hear is one of the best in Florida.
If you do a search on yahoo there are some links to their services, and it sounds wonderful. Apparently it is better than the one at the GF, but since the institute closed I think that more ppl go to GF.
I'll let you know my impressions in a few weeks if you'd like!