how much you looking to spend. really comes down to how loud you want as all of these pipes sound a little different. i will say check out thunderbike. but if you can hear them in person thats the best way to decide what you want

Frank

(Former)05 BA tbike pipes, ai removed, Freak, mikuni hsr 42's, 904, ported/polished head, 1mm oversized valves NOW-2010 silver and black tbird