I am in 2 minds whether to replace the mid-pipes and muffler. On the one hand I would cherish the increase in power and nicer sound track, but on the other hand I am worried about getting the attention of the cops. My car has had a few things done afterall and may not necessarily be legit.
Two exhaust I have been really impressed with are the full CP-e one, and the one that Prof has on his car. Prof's is a custom cp-e mid-pipe (with race cats) and a dixie titanium rear muffler. Just don't ask about the price and you will appreciate how good it actually sound!