From what I've heard, the Borla is quiet and gets the most votes. It's a killer company and exhaust system so you cannot go wrong. The other notables are Injen, Mussa, ARK, and I think one of the EBAY exhausts was pretty quiet....the Psudo one I think.
Hey DarkSoul, what's up with the SRT Neon? I believe I detect stress and agrivation in your signature! :3_confuse