i really wouldn't gear it down with you riding in Minnesota . i would ride it first to see if there is even anything you would want to change ,i also would not worry about eating belts clutching is Polaris's strong point and they are very very good on belt life.
Good catch. If you ride in Minnesota, and ride trails, I would probably leave the gearing alone, or maybe add a tooth to the bottom, but I would agree, ride it first. You can always regear it for a trip to the mountains. Or not. My wife's 600 with stock quickdrive gearing is very competent in the mountains, but I think the quickdrive helps.
Trail riding, the biggest issue you may have will be cooling. Lots of threads on here about cooling for the Pros. I think GOOD scratchers and a better snowflap to redirect that snow is a good start. I am going to probably put a 2016 SKS snowflap onto my Pro, it is longer, scoop shaped, and is not full of holes and less than $30. Lots of other things on the snowest forums to help with cooling but this is what I am going to start with.
Edit: AND add bogie wheel kit(s). help save hyfax on trail.
