Pearl Izumi gloves are very warm and have a good dexterity to ride all winter in upstate NY in temp 30F and below.
If not enough, silk liners add an additional warmth and temperature range. I prefer silk over the merino wool liners-thinner and easier for the glove to slide on/off .
If that is not enough I would opt for the ski Swany X-change gloves -they even have a chemical warmer pocket. For me Swany gloves maybe too much for bicycle riding in winter. My feet start freezing way before my hands.
