Zadok, Been there and am doing that! I owned a WR250R last year. It was NOT the dirt bike I wanted it to be. I traded it for a 08 WR250F 3 months ago. Initially the increase in power was awesome. It was light years above the "R" in every way except long distance high speed riding (lower gearing and a 50 tooth rear sprocket). I actually called my local dealer 3 hours ago (before reading this post) and inquired on a 07 or 08 450F. I find myself already wanting more out of the bike. I'm jealous of all my buddies who can cruise down logging roads in 2nd or 3rd gear when I'm in 4th. I have ridden my buddies 06 450F and like it very much. I am only 5'7" and have to use a Yamalink just to get the balls of my feet on the ground. The Yamalink seems to make my 250F turn on a dime and soak up all the tight trails have to offer. My thought is that the 450 will handle very similar with my link installed. His steel framed bike has a much higher center of gravity (or a least it feels that way) compared to the newer versions. Not sure if the boss is going to let me get away with ANOTHER up-grade, but it's certainly what I would like to do. Good luck.