Bark too much for bite! Which Muffler?
I run Dynomax Ultra Welded with a X-pipe and it is considerably quiet in my opinion. Make sure you install a X-pipe if you don't have one..... it will make any exhaust not as loud AND benefit the exhaust system. I was amazed of the difference when I had the X installed.
Pick your poison:
http://www.dynomax.com/soundsofdynomax.php