As an XC skier I vote for XC specific gloves W/ some insulation. These gloves are made to withstand constant wear from poles. I use mine for snowshoeing unless it's very cold. Then I use my heavy duty GTX alpine skiing gloves.
BTW, See my new post on gloves & mittens.
"There are no comfortable backpacks. Some are just less uncomfortable than others."
I've started wearing wool mittens. I don't seem to have to keep taking them off and putting them on because the wind blows through them a bit, yet they are still warm, even when wet. They are a coarse mitten wool by Briggs & Little.
prefer Seirus liner gloves (<2oz) as they are quick drying highly wind resistant (unlike standard Thermax glove liners) & somewhat water resistant, though will eventually wet through. As long as it's cold <20-25 F my hands breath well and stay mostly dry and quite warm even when I face plant or stumble into the snow climbing a steep hill, etc. ; Get wetter easier around 32 F, understandably. Cheap; usually last at least 1 season if I don't lose one of them! (Why do I always lose the LEFTs??!!)
If it's especially windy or rainy add my MLD Event mitts (0.9oz!!);(Only $45!!) I've dried my liner gloves wearing them inside my MLD's while warming my fingers cuz I waited too long to add the mitts. And they breathe pretty good even around 32 F.
If it gets much colder I use my 3.8oz BPL Feathorlite Vapor (Barrier) Mitts which are also waterproof very wind resistant and very warm, yet breathe well. (NOT cheap $145 new; btw - I have a size Med 2008 for sale ~$100 - new with tags! Never worn, had to size down)
I used to use Etowah SUL (<1oz) mitts similar to Frog Toggs material. Cheap ~$30, warm, highly water & wind resistant; but NOT durable - falls,abrasions wear finger palms near tips. Usually can make them last a season, bug cheap enough to replace. Lite enough to carry year round for those 50 degree rainny days when your hands get cold!
I go with a wool mitt that is particularly good when wet. For particularly windy/cold midwinter conditions when I'm not too active and really covered up everywhere else it would make sense to add a light wind/rain layer. I can't see anything weight 3 or 4 oz making much sense though, unless I was cold water paddling. There is always the option of putting your hands in your pockets. Oh, yeah, snowshoeing or skiing. OK, maybe some overmitts. Cheap light nylon oughta do it though. Maybe that quick drying brushed nylon material from an old pair of light hiking short or pants, for some grip. For extra insulation or to dry them out you can also put a pair of you socks on over your wool mitts or gloves, or wear them instead of.