It depens on how much snow/ice you get and for how long. I would, at the very least, get an A/S tire that does really well in the cold for an A/S. And I would also get a set of crappy winter wheels that you don't care if they get banged up and are cheap to replace. They'll eventually pay for themselves in mouting/balancing money saved. Also, you can go with a taller tire to give you a bit more ground clearance and absorb bumps better. It'll hurt dry cornering and steering feel, but it doesn't sound like that really matters.