I realize that people many or may not like my choice is tips...I like them.
Back to the mufflers. I went with ANSA cans...I think I am the first...
All i did was replace the mufflers. There is a drone from about 1200 rpm tp about 1700...very loud.
I was thinking about doing an x-pipe later after I get used to this sound. Under full throttle though it sound good and a little throaty, but not overbearing at all.
Here is a clip of the sound just revving....
http://www.youtube.com/results?search_query=m5+ansa