Currently, I have a Bama SCT tuner, but I might switch to Steeda or get a local dyno tune down the road.
@stemar: Good points, my GT is too a DD and won't necessarily need the top end. I didn't think about getting shorties with a high-flow mid-pipe... That's also an option I'd consider.
What I'm worried about most is that it's against federal law to swap out your catalytic converters (or remove them, obviously) with replacements that aren't certified replacements. The BBK catted h-pipe I want doesn't mention anywhere on AM's product page that it's a certified replacement, but I'll do more research later. I want my car to be completely legal and avoid any fines, once again it's my DD and I'm only a kid in college, I'll have my weekend race car eventually.