You might want to consider a few of the following that have always been good: Ackropovic (first choice) then, Yoshimura, or Muzzy. As for other mods, you might think about a power commander, maybe some cosmetic stuff to make yours different from the crowd, like a painted fender hugger, or polishing the aluminum on the bike. If you are looking, there is plenty out there. Let us know what you decide to go with!
-Cops want a hot pursuit, so entertain them! -Shadee