I think tim's is quite hollow and light and i think it'll be raspy at the top end. If you want deep, try a custom one.

http://www.flickr.com/photos/27660780@N02/3710035098/

He's mine thats quite deep.

Get your cars on the dyno to see how much gain u got from it!! i got a 9kw gain ATW with Injen intake and Custom Exhaust