In reply to matt pigden:
I have three pairs of winter gloves:
ME Randonee - Fantastic, dexterous enough (for me) when leading, warm enough, warm when wet, I love them. Disadvantages, a bit of bugger to get on when wet and I have the standard so the cuff is short but I believe there is a gauntlet version now. Size them right as the pile will pack down a bit.
Chamonix Bin Men Gloves - My default non technical winter glove. Cheap, durable and when well worn give the impression you know what you're doing (even if, like me, you don't!)
BD Mercury Mitts - the s**ts hit the fan glove.
I only lead V in winter though so if you climb hard, you might have different needs.