I had a Sho Shop Y pipe on mine and removed the resonator. Sounded just like you described. I put the stock Y back in and it improved. I got a custom cat back system done using a Magnaflow muffler. You can see it here . Nice deep tone, no rasp.
Hope that gives you some help.

"Talking is masturbation without the mess"...Our Lady Peace..

This is my car....