Gotta say...very, very happy with my Flowmaster Off-Road Extreme. I've had it for a couple of years now. Deep growly sound, not raspy.

There are two video (with audio!) clips in my member gallery, comparing the stock exhaust sound with the Flowmaster sound. If I were more of a genius, I probably could have figured out how to link those clips to this post. (Can anyone help me with that?)

As a bonus, the muffler is a cool-looking black diamond-plate steel. Coupled with a carbon-fiber (or fibre, if you're in the UK) exhaust tip from eBay, I now have a color-coordinated Ebony VX. I ever roll it and get stuck belly-up, I'll look AWESOME.