Like the subject line says... I've been pouring over forums trying to find the best with a healthy rumble to it. I want it louder than stock, but not super loud (quieter than SLP LM), kind of a 2v/4v sound. It seems to me the best bet is the Pypes mid-muffler system, or to go with more of an o/r h pipe with flows or borla or something? any more ideas?