Used Specialized sub zeros last winter commuting and they are a great glove(s). One of the best things about them is their adaptability. In the really cold mornings you might need the outer and inner but only the inner for the ride home. I also bought some merino glove liners and this set up was perfect. No cold hands at all and rode in temperatures down to -10, ice forming on the bike, ice on my eyebrows, etc but my hands were still warm. Only issue I have is that they're not waterproof so thinking of buying some Tuff Bag mits this year for really wet commutes.
Tried 661 storms – not breathable at all, cuff too short, inner comes out when you take them off, not waterproof, but they are warm.