ok im kinda new to whole snowmobile sean ive rode my buddys 2000 800 rmk a few time's this year and i use to ride a lot when i was kid now im thinking about buying his 800 rmk the engine has been rebuilt about 600 miles ago and the crank has been trued and welded and it is has the double bearing on it also has a 144 track 3 inch risers and simons skis other thank that its stock. my only problem is the thing has been riden hard and banged up pritty good over the years. and ive been looking around and i can get a 2001 summit highmark 151 track w/ around 500 miles on bottom and top end eng. sled is close to stock w/ fly bar and riser, ported track, and stinger. for around the same price and in better shape. what do you think is a better sled thanks?