There are some pretty cheap carry over 4 wheelers in my area, and i have been wanting to get one for a while now. There are 3 within $500 and i have no clue which one to get. They are 2008 650 H1, 2007 700 EFI, 2007 650 H1. Are there any differences between 07-08, and are there any major problems with any of these motors or models. We currently have an 06 500 Manual which is still the new chassis and love the ride and handling. Is there much of a power difference between the 650 and 700?