I think windproof is the wrong approach. This is what creates the wet, sweaty interior that will do you in when it's really cold. You need something that breathes.

I've recommended foxwear before and still do. Lou can set you up with something that fits and works well in the cold, especially cold and dry.
http://foxwear.net/

You can get fit, color choice and reflective strips all for a reasonable price.

It's great you have some sample fabrics, so you can conduct your tests. I am looking forward to hearing your results.