My fifth set-up, but I'm liking it: Greddy SP2. It's loud enough when you're at WOT, but at idle and in-town driving, it's pretty damn quiet. Near stock when you're just sitting there! Def. A+ in performance and sound, but gets a C- in fitment, since XL hangers are going to be needed [rubs against the exhaust shielding in the rear.]
SO! Here's a clip. Enjoy.
http://www.youtube.com/watch?v=MID0Fi_5_fQ