Check with TireRack.com
I've had very good luck with Dunlop Winter Sport 3D.
Go with the a tire that is a bit narrower than stock as they'll go through the snow better. I'm using 235/40/18 all around. You'll give up some performance but you'll go in the snow! Also, it's better to get a wheel/tire package. That way you can swap summer to winter in less than an hour in your own garage.