In reply to jolivague:
My 2p worth;
BD Absolute mitts would be my choice out of that list, they are very similar to OR Alti mitts (which would be an ideal choice).
In my opinion the BD Mercury mitts aren't warm enough, but that said I've known people use them on Denali without problems.
The RAB mitts are like comedy boxing gloves, warm but you can't do anything with them. No dexterity at all.
Can't comment on the PHD mitts as I haven't seen them or used them.