The usual recommendation here is that an old plow truck will be way more comfortable, warmer, and plow better than a small tractor. You plow with a tractor because you already had the tractor, not because you bought a tractor just for plowing. If you have no other real use for the tractor, then get a plow truck.
If, however, you actually want a tractor, then yeah. The LX is a good machine. L is better buying if you don't need a cab, don't need a mid-PTO, and don't need a lightweight machine to put it on a trailer/drive it on your lawn. If you see a blower in your future (and you're indicating you might), and that blower is a front mount, then the LX is the right machine. If you can live with a rear mount and a mirror, then a bigger tractor is possible (again, an L).