I'm in NorCal and was considering the same as I have a YZ426 (the boy loves blue!). But the more I looked around, the more I am drawn towards the CRF50. The CRF will be green sticker if it's 03 or newer, as the PW's will be red (I was shocked at this one - I can just imagine unloading our bikes during green season, and having to load back up because my son's "chainsaw" has a red sticker!). The CRF's also have 3 speeds and are chain driven, as opposed to the single speed gear driven PW. The upgrades available for the CRF are like having a PW50 and PW70 in one. I'm going for the CRF, then buying a blue plastics kit and getting some vinyl Superman, Spiderman etc. stickers to put on them, while keeping the stock plastics unridden on so that when it comes to sell time it will look new! Plastics only run around $120 for the set. There is also a seller "safelyride" that sells the center mount training wheel
set for $60 shipped - much cheaper then the stores. Hope this gives some insight to your searching!