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 susp ~ BMW Perf Exhaust ~ 3.38 lsd ~ SF71 Alf CSL reps ~ Continental Extreme DWs ~ AA Tune ~ WTB: e93 M3 Fron Sway Bar