Joek,
I'd consider whether or not you'll be taking a firearm with you to FL when you fly. If so, you're going to need FL anyway. To me? I'd do both if I thought I was going to fly to FL often enough. Another consideration for FL... if you're going on vacation -- are you even allowed into Disney with your pea shooter? To me? just another hassle. When I fly, even if I can carry - I usually dont. ** depends on where I'm going.
Since PA is close and is fairly cheap, I'd be getting PA as well. If you get pulled over in PA, it's going to go over smoother than you pulling a FL permit out and trying to explain to the nice officer that you have reciprocity there.
Just my .02.
Moosie