Broward/Palm Beach? I've messed around Fort Liquordale some, way back when. My first wife was from Hollywood. I've hunted mostly in the "jungles" of the bottoms along the Appalachicola, below Blountstown.
One of my few very strong opinions about guns is that pistol-grip shotguns are about as bad an idea as ever came down the pike. I have reasons, but I'm not gonna hijack the thread with them.
I've used an old Model 12 pump gun for about forty years, and done some quail shooting with a semi-auto. IMO, it's all in what you get used to. I sorta like the pump, more, I guess, although my Beretta 390 is a good gun. For no particular reason, I've never really cared for double-guns, whether side-by-side or over-under. (Helluva note, with a Browning Lightning 20 sitting in the safe.
)
I do like a vent rib on a shotgun, for sure. I see no reason not to go with the 870in 12-gauge. I'd get one with a 26" barrel and screw-in chokes. The main thing is to hunt around for what brand/size of load patterns best. Lotsa info on that in the Shotgun forum.
I load for a bunch of stuff, from .223 to '30-'06, and have hunted with all of them. I guess that for centerfire on Florida game, a bolt-action in .7mm08 would be as effective as any and a tad less recoil than many. Probably better for hogs than a .243, which is one of my go-to cartridges for whitetail.
For all that I have 3x9 scopes, that's more "because I can" than it is from "need". I had no trouble in a one-shot 350-yard kill with a 3x9 set on 3x, so I get a bit cranky at the idea that anybody really needs more than a fixed 4X for 90% of all hunting.
Certainly, not inside of 200 yards, anyway, not even on feral cats.
Nuff fer now...