Thanks for the responses, or at least, for the ones that attempted to be helpful, which was all but one, heh. I have plenty of cold-weather-activity experience -- I'm a ski instructor and a whitewater kayaker, and I hike and snowshoe year round, so it's not like I need to be taught about polypro, rather what works well on a bike. My commute is in Boston. I doubt I'll commute when it gets seriously cold -- my cubemate did that last year and got frostbite, which isn't something I can afford to get.
Thanks again,