Southern Ontario doesn't get too cold, and I get by nicely with a pair of leather driving gloves for most of the winter. That said, I bought a pair of softshell crosspoint gloves from Showers Pass recently. They're waterproof, comfy, and have padding in all the right places. But I got a nasty surprise the first morning I wore them to work -- they're not windproof. I may as well have been wearing a loose wool mesh.

But the same company also sells a hardshell glove, and a liner intended to go underneath. Has anybody tried that glove? If its windproof, it might be just what you want along with the liner. Otherwise, the Gore-Tex mitt mentioned above would be my choice for ultimate warmth and water resistance, or the snowmobiling mitts, although I wouldn't want to lose dexterity from the very bulky fit of those two.