I think it depends on the flexibility of your employer, your driving skills, and your particular route. If you MUST make it to work every day, or you suck at snow/ice driving (or are just afraid of it), or your route sucks (stop lights on up-hills, poor plowing/salting, etc.), I certainly wouldn't fault you for choosing an AWD/4WD vehicle (and I would do the same). This is likely not a popular opinion on this forum.
BUT, as ketchup said above, AWD won't make you stop any better. However, snow tires will. And not driving like an over-confident ass will help also.