I just bought a 03 zx600 RR, I want to add a full exhaust system. whats the best choice for this particular bike. I do not race this bike, but I am looking for the system that will provide the most horsepower throughout the entire rpm range. money is not an issue in my determination. I am aware of the Akripovic race system that is available through kawasaki, I just dont want to spend 1,500 if it only gets me a couple of more horsepower vs. another brand. I will also be getting a POWER COMMANDER with any new exhaust system. Thanx for any help you can send my way.