I went with the Flowmaster 942542 40 Series Delta Flow Muffler after some looking around on youtube trying to get an idea on what it would sound like. Got a real great sound for less then 100 dollars. Its on the louder side of the scale, and theres a little bit of drone on the highway, but it can be controlled pretty well with some throttle feathering.

Sound clip: http://www.youtube.com/watch?v=DqhEDHbuF10 [videp=http://www.youtube.com/watch?v=8J4xTOGu0jk]http://www.youtube.com/watch?v=8J4xTOGu0jk[/video]