I am trying to decide on getting either a used WR250 or WR450. I will do a 50/50 split between riding mx tracks and trails in NJ/NY/PA/CT so this means soft and loose mx tracks and extremely technical rocky/rooty/muddy East coast trails. I want a low maintenaince bike that is reliable enough where I can just take the bike into shop twice a year(check valves, piston, rings, etc) and I would do the air/oil every few rides myself. I weight 200 pounds without gear and value fun over speed. Given my weight I am afraid I will over work the 250 and spend too much on maintenaince and want more power in 6 months but on the flipside I am afraid the 450 is too clumsy on the mx track and super technical trails. I have found a 2003 WR250 and a 2003 WR450 that fit my budget(around $3000) so I am anxious to move on either one of these bikes before they are gone. So I humbly ask all you WR kung fu masters to show me the way.