Why buy an xi? I live in a city known for snow fall and I get along great with a 330i and decent snow tires. That includes trips to ski country where it's much snowier with more hills.
Buy a car for the rule, not the exception.
330i ~ BMW Perf. Susp. ~ M3 Front Control Arms ~ BMW Perf Exhaust ~ 3.38 lsd ~ 230s ~ Pilot Super Sports