If the OP is still looking for an exhaust that will give that deep growl, then I say AAM. I went with their system and test pipes and it sounds AWESOME. My sound clip is on AAM’s Facebook page. When I first put the exhaust on it had a little rasp but now that the pipes have aged and seasoned it is incredible. Deep rumble at idle to a screaming banshee at WOT. There is no drone and when I poke the throttle, I get that nice "WRAAAAAP" that makes my trousers a little tight. I find myself blipping the throttle just because in order to hear that sound.
If you don't want to spend a grand on the full system, the short-tails would sound great and be very economical but call Jason and see what he can do.
My exhaust:
https://www.facebook.com/video.php?v...108584&theater
Short Tails
https://www.facebook.com/video.php?v...228456&theater