I bought a 800 Sportsman and a 500 Sportman, both 2007's, from a dealer last spring. They both had about 2,000 miles on them and now they have about 2,500 miles each. No problems yet but now that I know I really like riding 4 wheelers, I was thinking I should invest in newer units and sell these 2007's off. These have both ran fine this summer but I'm wondering if I should expect expensive repairs to make soon considering the mileage or will these units be dependable for a long time to come? My only real beef with these is not having power steering. Are the newer models significantly better? Like 2011's or 2012's?