You won't go wrong with either a Bushmaster or an Armalite. FTF's are almost, if not always, mag related. Get a factory assembled one for your first, unless you're mechanically inclined.
You'll find that there are some folks that are completely loyal to their favorite brand (Hi LARRYG), but that is usually because they have had nothing but good experience with said brand, and maybe not so good experience with another brand. It used to be that Colt was the way to go, but between their quality slipping and aftermarket manufacturers getting better, that's no longer the case, IMHO.
Pre-ban costs a lot more and the only advantages are you can have a telescoping stock, bayonet lug, and flash hider. Post ban guns shoot just as well and are just as effective, especially if you're just going to be plinking or shooting at paper targets.