One more recommendation - Sporthill XC pants. I bought a pair of these a couple years ago they are wonderful for winter. They are slightly higher than your price range at around $100 - but I think well worth it. You can find them on sale in the off season. I did.

Anyway the say they are windproof to 35 mph, and they are. The fabric 3SP is amazing they breath well, and regulate your temp, yet still provide a thermal and wind barrier. They are loose enough to wear a base layer underneath, and with that I can go down well below zero F. They are not hard rain worthy, so it's that's an important to you they may not be the best choice. But they are great for snow, I've also used them for down hill skiing, cross country and snow shoeing, they totally rock. Considering how well they perform and how much the competition charges for high tech soft-shell pants they are an absolute bargain.

I discovered them on Peter Whites site.
http://www.peterwhitecycles.com/sporthill.asp
http://www.sporthill.com/index.php