The Nacra 20 is the ticket for South Florida! There's lots of them around, more action than the F18 down that way as well. The 20 is seeing a nice resurgence with many boats showing up to many regattas.
They also hold their value very well. An F18 is going to drop in value rather quickly, whereas the 20's are staying fairly steady. There's nothing more fun than sailing a rocketship through some big waves. It has a lot of power and can be tough to sail in a blow, but I like a challenge. As for conditions less than 15 knots, most knowledgable sailors will have no trouble controlling her.

Pitchpole? Hhahahahaaha-forget about it.