There is NO way that I have found to get your V8 sound out of the contour. There just isn't enough flow to make that noise. Trust me I've had more exhausts on my car than most- stock SVT, Borla, True-duals with magnaflows, Stock SE exhaust. Yes the stock SE exhuast was a temp until I could get the duals here from MI.
Like I said before, if you're going to drop $50 or more on a muffler and another $30 to have it installed you're really fooling yourself and wasting good mod money. If you're intent on buying something just for the sound of it I'd recommend Magnaflow.