Ben Moore has their test farm in Florida as well, I'd go for Royal or Ultra Spec.
Behr has improved a lot in the last 10 years, their color still has a fading problem but the paint itself isn't as bad as it used to be. PPG is also working on majorly revamping Glidden after Akzo Nobel neglected that brand. However, most mass-market paints are fomulated as a compromise for all of the US. I think Ben Moore, Sherwin-Williams and PPG's non-Lowe's/Home Depot/Wal-Mart lines can get away with those differences.
Does Florida have a "hometown" paint company like NorCal has Kelly-Moore, SoCal has Dunn-Edwards and Oregon/Washington with Rodda or Miller Paints? I think a more "locally-formulated" paint might be what the doctor ordered.