Right now I ride a 97 rm250. I've been riding this bike for about a year and a half now and am looking to upgrade to something newer. I'm pretty set on getting a crf, but I can't decide on a year or if I should get a 250 or 450. I'm looking in the 2002-2006 range. I'm 160 lbs and ride hillclimbs, trails, and little bit of track and like to jump. Basically I need to find out if I will be satisfied with the power from a 4t 250 coming off a 2t 250... Any recommendations???