if you get more than an inch of snow you'll want to run snow tires. if less than an inch or your area has good snow plow service, you might be able to get away with tires by Continental called DWS. D = dry, W = wet, S = snow.
I actually tested this tire on my front wheel drive dd this winter in our snowbelt state, and it's been doing pretty good. not as good as snow tires in deep snow, but quite good.
here's a good site to get your tires.
Tire Rack - Your performance experts for tires and wheels
also check out locally:
www.discounttire.com
for snow tires i recommend the Bridgestone LM60.