Let me know what you discover as I'd like a good one too. :-) I had a decent, breathable pair of wind pants for many years, but when it came time to replace them, I couldn't find any with the same fabric. I did find bolts of the fabric but couldn't convince my wife to sew me a new pair.

One problem I've had with breathable fabrics in colder temps is that the vapor hits the material and frosts/freezes over rather than passing through. That would be another test I'd like you to add to your experiments. :-)