[sperry]

I'm pretty happy with my Vishnu... it's pretty mellow, no droning. My goal wa performance w/o the noise if possible, and this seems to be a pretty good setup.

Zero's right about the up-pipe. I had leaks until I finally tossed some ceramic gaskets between the header and the up-pipe, but a JDM catless should be fine if you install it with new OEM gaskets.

Alot of people are doing PDE downpipes, then a cat-back. The PDE dp is a stock replacement piece, so you'll be able to use the stock parts or aftermarket parts with it. I hear it works great at increasing low-end torque. So, that's another option.