I buy my work gloves...
I consider myself a winter-workwear "expert". These aren't too fashionable, but for toughness and warmth they are very hard to beat. I used mine ice fishing in Alaska at -20°(f) and still have all of my digits.:
http://store.glennsarmysurplus.com/usgi-intermediate-coldwet-weather-gloves-gore-tex-p731.aspx