I like my HKS TI. If you still have your cat on there...which I still do, it's pretty quiet at low rpms but it will open up at full throttle. I made an amateur video of my exhaust here (You may want to turn up the volume to hear the deeper purr of the exhaust):
http://www.youtube.com/watch?v=uzKhWJogbdY
Unfortunately, I did not have time to make a video of it at full throttle, sorry.