I've had my '02 Audi TT Quattro 1.8T for about 6 months now, I haven't started to work on it, but i'm trying to decide what kind of exhaust to buy.. I mean I want something that sounds nice, not something that sounds like another civic coming down the block.... Any suggestions?

Also is the piping on a catback the same for the 180 and 220hp models? I want a dual exhaust but my car comes with a single stock. If I modify my rear bumper would the dual fit?