My trusty wind shell died a natural death after many years of hard service and I'm looking for a replacement. In winter I wear a base layer, a mid-layer, a down vest, and a wind shell.

I've been a bit surprised by how little I've been able to find. I guess pretty much everything is some form of breathable rain gear but I like a non-treated wind shell. I find that they breathe right and work very well for winter.

Any other suggestions for a windshell? I'm curious as to what other people wear as an outer shell for winter. I've managed to avoid the heavy parka thing but maybe that should be an option as well. I prefer layers though.

Edit: I'm curious in the outer layer that people use when the temp starts moving into the teens (fahrenheit) and below.