I would say Akrapovic if you can afford. Scorpion british made and work very well at a fair price. Arrow (Italian) some of the early ones were filmsy, slightly cheaper than Akrapovics. Yoshimura# over priced, road models are heavy and crude in construction compared to top end stuff. Carbon Can Company, Uk made, cheap but very loud. Remus, Austrian, fair price, good build quality.
In Summary I would really only consider 1st Akropovic, 2nd Scorpion, 3rd jointly Arrow and Remus in that order [smiley=thumbsup.gif]
Note: # Yoshimura proper works/racing systems are brilliant things but these cost scary money! :'(
