I am a beginning rider and was wondering whether I should buy a wr250 or a wr450. I'm 6'2" and weigh 210lbs. I will basically be riding trails and stuff like that. I was thinking that the 250 would be easier to handle and be better for me since I am a beginner, but then I started thinking about my size. What is the difference as far as handling? The specs say that the 450 is 16 lbs heavier dry. Is that a significant difference?