I made the move from Cleveland to SouthBeach 3 years ago and have to say it is the best choice I have ever made. Boating down here is unreal and there are always new places to explore. Add to that the hottest south american woman and nightlife in the world and this place is hard to beat.
If you want a central place to dryrack your boat, you might want to try Haulover. Thats where I keep my Fountain. It's definatley not the nicest place and a little old and run down, but the staff is great and they always take good care of my boat. There are a few high perfs there and alot of FL Powerboat members meetup there to ramp in for the poker runs. The number is 305-945-3934.
Central location to Miami and Lauderdale.