I have been racing 2 strokes for a number of yrs. Primarily the CR 250 with a YZ thrown in here and there. I just picked up a new 426 and can say hands down that I will not own another 2 stroke for racing. I race on both wide open outdoor tracks, and tighter more technical supercross type tracks. I really really like the 426. It is the best bike I have ever owned!!! I envy your position, life is full of tough decisions like the one you have to make.