I bought a 2008 Yamaha WR450 over the weekend and I have all the basic mods done now after my first trip, but I am looking into getting an aftermarket exhaust system sometime in the near future. I've done some research on the exhaust pipes for the 2008 WR450 and I'd like to get some opinions on which one is the best one to go with. 1. FMF 4.1 Complete system w/ Power Bomb header - $800 2. DrD Dubach Racing Exhaust - $467 3. Pro Circuit System - $750 4. Yoshimura Titanium System - $850 Obviously for the prices Doug Dubach has got the best deals by far. I have heard really great things about the DrD systems too. I want to know which one you would go with and why. I know the DrD is a great price in comparison, but what if they were all the same price, then which one would you go with? Also I don't race, so I am not overly concerned about weight, so is my best bet to just go with an aluminum/stainless system because they get the same power output (which is what I am leaning towards) or is there any performance differences in the other ones (titanium or carbon)...becuase if people are paying nearly twice as much for the difference of a couple pounds and are not seriously competitive racers....I think they are wasting their money. Thanks for the feedback!