Cycling and winter can be mucho hard on hands. Fingers wrapped around a handlebar are really exposed to the wind, plus even with cork handlebar wraps the cold for the metal bars (less of an issue with carbon, I suppose!) gets transmitted right into the hands.
So good gloves are important. My glove bin out in the garage must have 20 pairs, from fingerless summer gloves to a dozen pair of warm gloves. I have three favorites:
For cool but not cold conditions, which I define upper 30s and higher, my favorite glove is the Manzella Silkweight Windstopper Glove ($30). These are a super-lightweight glove that are incredibly warm, with windproof outers and just a little bit of interior knit face for warmth. They technically not a biking glove; they are unpadded, and the rubberized grip material on the palms wears off quickly. But I usually get a season or two out of a pair. The temp range is easily extended by adding $10 silk glove liners (found anywhere).
REI's One Gloves ($37) also are a multi-purpose glove that I find work well for cool cycling conditions, down close to freezing. They have tough and wind-resistant nylon and Spandex outers, goat skin palms, and polyester lining. Like the Manzellas, they can be reinforced with a pair of silk glove liners.
Below freezing, only one glove will do: Pearl Izumi's Barrier Gloves ($70). These are built like a ski glove, with water-resistant outers, a waterproof-breathable inner liner, and polyester insulation. VERY warm and weather-resistant, yet trim enough so you can shift and otherwise manage the bike okay. The Lobster Gloves ($70) has the same construction but is even a little bit warmer because of their three-finger design, with two pairs of fingers packaged together for warmth, while the thumb goes it alone.