I want to go with an aftermarket muffler on my V6. I am thinking of a Z55 but want to know others style setup and sound. I basically want what everyone else wants. A somewhat deep -non buzz bomb sound. I was thinking of just having a muffler put on my stock pipes. Anybody with this setup (or even same muffler with different tailpipes) with feedback? I can get the muffler with installation for $100.00 using my pipes. Is there better sound by going with an echo tip? Is there a lot of cab noise (I drive a lot on the interstate)? Thanks.