there is not going to be one reply to this - everyone will have their favourite
Gloves are just one of those things you have to make educated guesses with and find out what works for you.
Plenty of gloves that I find warm enough, others will find are not. And as pointed out earlier - keeping your body at the right temperature will also affect how warm your extremities are.
If you are out more than a couple of hours and it's really cold - it's also a good idea to keep another pair of gloves near a warm part of your body to change into when your first pair has started to be cold. This was a trick I learned as a bike messenger in one of the coldest winters Denmark has had since I moved here.
Favourite gloves at the moment are Northwave Husky gloves with a foldable mitten part. For if it's really cold.
http://www.northwave.com/it/product/-hu ... ter_gloves
Completed: 94 Stumpjumper w. M733; ; 92 Dave Yates 731 ; 97 Parkpre Pro-Elite ; Pace RC200 F6 ; Pace RC300; 82 Gios Super Record ; 97-8 De Rosa Giro D´Italia; ; Banani SPX Track bike ; 89 Alan/Mavic Cross Bike ; 05 Focus Cross Team ; 90 Look MI-80 all-Mavic ; 12 Focus Izalco Team/custom build ; 11 Focus Thunder Custom build
Projects : , Brouwer all-Mavic
Stripped : Pace RC303
Gone : GT Karakoram
Stayed in the family: Kuota Kharma, 04 Stumpjumper FSR
Ceased to be : Dynatech MT3, killed by corroded seatstays.