I've tried a few different exhasts and this is the one I like the best. Very happy with my Yoshimura RS-3 Oval. I also like the TRS Tri version. Great sound and fairly loud when you ride it hard. Not that loud when you ride easy. I like a pipe that you can live with in long distance cruise mode. This pipe does not drone or annoy at crusing speed.
It also has a noise reducer insert (which I use) so it can be louder if you want.
I've run this over 10,000 miles and it's holding up very well. It also comes in Stainless and Titanium versions.
The Micron sounds great, very cheaply built and won't last, it is louder than the Hindle and the Yoshimura.
The Hindle is well made, sounds great and is louder than the Yoshimura but quieter than the Micron.
The 2 Bros. is louder than the Hindle, Yoshimura and Micron. Not sure it is as well made as the Yoshimura or the Hindle.
The HMF sounds great, is louder than the Hindle and the Yoshimura. About like the Micron, is well made and should last.
The Kewl Metal pipe that Doc used to run is just that, a pipe only, it is offensively loud (except to Doc who just enjoys a good aggravation). It should last forever since there is nothing to go bad.
I also like this one. Basically it's the same can but with a triangle shape instead of the oval I'm running.