Jawine, of the various liner gloves I've tried over the years, the "Icebreaker" merinos seem to work best for winter conditions. I have a lightweight and a slightly heavier-weight pair. (I also use the lightweight pair for summer riding on my motorcycle--inside leather gloves--because they breathe so well & feel so nice--better than silk, because they fit more snugly on my hands.)
Have to say I've not found a really good balance between warmth and "handiness" in the winter--Ottawa's pretty cold, mind, so others may not have this problem. I've found that mittens + Icebreaker liners work much better than any form of gloves, including lobster-claws. Best mittens I've found are made by Outdoor Research [OR]; BUT, they're clumsy & bulky, esp for bicycle controls. OR do make gloves from a fleece-with-windstopper fabric, as do Marmot, but I find that these work well when the temp approaches 0 Celsius, only if used with an Icebreaker liner.
I stop riding by early-mid December, unless for some reason there's no snow & ice by that time. (I'm not hardcore.) So, I can't really offer advice on hand protection in temps which are much below freezing. The references above to OR mittens + Icebreaker liners are for X-country skiing in temps down to about -15 or -20 -- not cycling weather!!
Good luck!
J.