As most of youknow now, I plan to get back into riding after a 3 season absence. I and allmost certian I want a WR rather then the YZF, but I want to know whether I should get a 250 or 450. I am, um... let's say, "heavier then I should be". I don't plan to race (but if I chose to compete locally, both WR's are fairly easy to change to YZ spec, right?) I ride mainly to get to the sand pits around my house (3 huge ones) so I spend time on fire roads and train tracks which have been torn up and fully maintaned into very smooth trails. So I ride hills and fairly wide trails. Also, I am capable of handling a 450, so killing myself isn't an issue, but for my weight I am not sure if a 250 will get me moving like I want to.