I will give you a dollar for dollar comparision with a little hp to go with it.
Worried about money:
Muzzy,Hindle,yosh,two bros,micron and the others how ever you please
Hp/performance forgetting about money:
BDE/Hindle,Arata,Akrapovic,Ti-Force,HMF Big bird,Muzzy,Hindle and whatevers left.