Here you go My Friend:
http://www.m3post.com/forums/showthread.php?t=109045
The Above Thread was Made for ALL Available Exhaust Systems for the E92 M3
to Be Posted in that Thread above!!!
That Thread Also Has Sound Clips, Web-Site Links for More info and Prices!
Scroll down the thread to view all the Exhaust's that are posted
and go through the whole Thread!
-Jack