One of the guys at work has a Magnaflow (at least he says it is, had it in the shop and the case looked more like a Flowmaster to me), and it's pretty mellow at idle, but has a bit of a throaty tone the few times I've heard him give it some gas.
This is the system I have on mine, I ordered it through Summit with RacePro mufflers... I'm not sure if you can still get it with those, but this link is for the kit without mufflers (add your own):
Free Shipping - Pypes No-Muffler Exhaust Systems with qualifying orders of $99. Shop Exhaust Systems at Summit Racing.
www.summitracing.com
Sounds like this (My dad & son in the video):