I have just the axle back tsudo which is $150, but I'd recommend this:
http://www.speed-element.com/servlet...muffler/Detail
Same axleback but in catback form. It's $250, cheaper than most exhausts. Raceland makes a cutback exhaust but i haven't met anyone yet who didn't think it sounded extremely ricey. The tsudo sounds good and mean. Another cheap exhaust is the strup exhausts, but I don't know much about them other than 09socal on here has one and he likes it. Good luck man!