I am just going to say, skip all the glove advice if your hands get cold easy. I have tried many many gloves and nothing would really work when the temps dropped below 0C.
I finally bought bar mitts. My life changed.
Last night went for a test ride at -3C. All I had was think liner gloves on my hands for just over an hour out and only then I started to get cold. I then put on my PI lobster gloves and one toasty for another hour out with no chill what so ever.
Highly HIGHLY recommend.