Wind blox for the ears (Amazon), thermal pants with stretch outer and thermal inner lining (
Amazon.com: Marmot Mens Polartec Baselayer Moisture-Wicking Tights : Clothing, Shoes & Jewelry), a balaclava made from silk, pogies or really good gloves, Merino base layers. I suspect you will have to try some different combos of things to find what works for you, so you stay warm but don't sweat all over.