153 3 inch would be a good all around track I think, more lug for the powder but still short enough for tight tree riding, 162 would be sweet as well, what do you ride now? I think it's gonna come down to the type of riding you like to do, I know there alot of talk about how well that new 3 inch track is gonna cool the sled when your bombing down the trail to your favorite riding spots
I went with the 162 my concern was keeping the front end down. I had a 153 2.6. I have owned both 162 and 153 before and really there is not a big difference as far as handling goes. When the snow is deep the track is never long enough i have seen plenty 174 stuck. But if you tree ride alot the 153 may be a better choice really depends on what type and where you ride.