Like the others I would also suggest the M7 or 8. I like my Proclimb but I would love to trade back to a 2010-11 M8. I still think that the M chassis is the easiest sled to ride and you can't beat that motor. The double wide main bearing in the diamond drive is a must. It's easy to pull it all apart and I bough the bearing and dropped it all off at a cat dealer. They pressed the bearing on and I put it back together. My brother has had an 06 M7 since 2008 and it's a ripper of a sled.