Off the shelf, you are pretty much limited to JBA, Borla or TRD. The JBA's will run you about $350 shipped, the Borla and TRD's are between $500-$700. I just was contemplating the same thing and ended up going to a local exhaust shop and getting a 2.5 inch custom exhaust bent up with a 24 inch magnaflow and double walled stainless tip. Sounds great, not too loud and no resonance when cruising. Cost $350 out the door.