Looking for a youth model atv for my son. He is turning 8 next month and I want to surprise him. He already has a yamaha 110 dirt bike which he loves. He also has one of those Chinese 50cc atv's which is no longer functional. I want to get him something but I don't want it to be to small that we have to upgrade in 2 years but I also don't want something too big that he would struggle with trying to control. It would be used strictly for woods riding so ground clearance and stability is a high priority. I was debating about the polaris sportsman 90 but fear he will grow out of it quickly. The other option I was considering was the arctic cat 150. Any one feel free to add their 2 cents please do so whether good or bad I would appreciate it.