I've been commuting on a cannondale R600 road bike. I thrashed it and have it at the shop to replace almost everything at a shop that specializes in restoring old bikes and does everything much cheaper using old parts they have from other bikes. I am considering a new commuter, mainly because I am concerned about traction in winter months. Is there an ideal road tire that works well in snow/icy conditions?

I really like the cyclocross bikes I've seen. I found a 2009 Gary Fisher Presidio for 1500 (down from 2000) that is truly nice but perhaps overkill. Does anyone commute with a cyclocross, what are your thoughts on this? I've been thinking I'd wait to see if the price drops at all, what would be a good price for the gary fisher?