Langman37, I dunno the nature of the rains you get in Florida, but are they thunderstorms? I mean to say that if you have the raining and then no sun, then beading water won't hurt as long as you have protection on the paint. If the rain you're talking about is thunderstorm-like with the sun coming out right after the rain, then I would go with a sealant. Dunno which sealant is best, though...
If you don't mind beading water, then Collinite is the most durable carnauba wax that I've seen. It also beads water very nicely. Of course, if you're looking for sheeting, then Collinite is obviously not what you need.
BTW, maybe you can considering hosing down the car after the rain has stopped. Use the free nozzle method so that you don't have as much water on the surface. Then, either dry by blotting the surface with an absorber/WW, or the best choice: use a leaf blower.