You will love that 426. I still have my '00 and love it. I also have an '03 450 and love it also. The 426 is heavier than the 450 and it is way obvious when you have them side by side. Howver it is tough to tell the difference while riding. As far as handling goes, the 426 will ALWAYS carve a tighter corner than the 450. The 450 handles like a pig. Power wise, the 450 has more but the 426 has a wider, nicer powerband. You can chug way down low and it revs farther than the 450. Just my two cents worth.