Charles,
I've had both the BX and the much, much taller B series. The BX is intentionally built lower to the ground. I live up north and we regularly get the kind of snow you folks in S. MI got recently. While the B series, with its much higher ground clearance, might seem to be the better snow fighter, in my experience, the BX is actually better suited for the job in a few ways. Just be sure the tires are weighted or filled.
Unless you want to do some horse trading for a B, you're not going to put anything bigger, in terms of wheels/tires, on that BX. What you do have to do is fight the snow the way one eats an elephant; one bite at a time. Taking on the task, 6" at a time is far superior to waiting until all 12" are on the ground. This may not be possible if the timing is wrong and you find yourself at work. In such a rare case? Ask the guy with the 3/4 ton truck and front plow to plow you out. Just a rough plow. You'll take it from there, doing the tidying up. A sudden 12-15"" dump is beyond the abilities of a small tractor, in most cases, but the good news is that such sudden dumps are once every 4 year type events.