Polaris dang sure isnt the best mountain sled, half the time it will break down before it gets you to the mountains and the other half of the time it will break down on the mountain. Sure they are great sleds when they run, but that is WHEN they run. IMO it is between ski doo and arctic cat because the Nytro just doesnt have the power or weight to keep up with the 2 stroke 800's (They are good sleds, just not for me) the ski doo felt more trail oriented when i rode one, and i am a huge cat fan so my vote is for the cat for best mountain sled in 2010. They made some great improvements with the power gain, and i really doubt that the lightened crank will cause problems, they didnt make it weaker, they made it lighter weight as someone mentioned earlier.