I am about to puchase a bike. I have been bikeless for four years due to a new addition to my family. That new addition is now riding his 50 well enough for me to ride along with him! The last bike I owned was a 01 KTM 300 EXC and prior to that I had a 98 YZ400F. I am 6 ft tall, 205 lbs. The 400 seemed really heavy to me, compared to the 300, however I really enjoyed the four stroke power and lugging ability. I anticipate racing a couple of hare scrambles this year, play riding in the woods, fields, and dried out creek beds around my house with my son, and maybe one trip to Colorado to ride in mountains and one trip to Missouri to ride trails in the Ozarks. I have found a 2003 YZ450f in great condition for $1900. The bike seems to be well maintained and not ridden often. I have also located a 2007 WR250f, like new, for $3950. For what I plan to do with my bike, is the newer yet smaller motor WR worth $2,000 more? Thanks a bunch in advance!