Winter Cycling - Gloves?

I'm looking at Pearl Izumi PRO Softshell Lite full finger gloves, which look great as the temperature goes down... but for snowy and ice conditions, what do I use?

http://www.pearlizumi.com/publish/content/pi_2010/us/en/index/products/men/ride/accessories/0.-productCode-14341009.html

These look nice, but the reviews I've read say around 40F they start to lose relevance ... it's too cold, they're not insulating enough. I see as low as -5C regularly, but I've seen as low as -15C.

Pearl Izumi says these work as a liner:

http://www.pearlizumi.com/publish/content/pi_2010/us/en/index/products/men/ride/accessories/0.-productCode-8769.html

Does that mean I can/should wear those INSIDE the Softshell gloves for added warmth?

I'm a big fan of glove liners. I have a pearl izumi set of gloves for really cold and I wear them around as winter gloves, but not really on my bike. I much prefer the glove + liner approach when riding. Much more versatile if it gets hotter than expected. Done the liner thing with both full finger and half finger gloves in different conditions. The liners I got that work well for me are some nashbar ones I got for like $7.

I double glove.

I wear summer-weight full-finger gloves (size L) inside cool/wet weather gloves (size XL). The outer gloves I've used for the past several years are the Cannondale Slice glove, F/K/A Cannondale Windfront glove. The local C'Dale dealer dropped the line when production wet offshore, so I'm using the stock I built up over the years. Not sure what I'll try when these all wear out.

I switch to lobster gloves below the lower-teens or upper single-digits.

I use lots of combinations for my winter riding. Bars mits for flat bars. For ice/ sleet/ cold rain I use med weight fleece gloves inside coated work gloves. These are the rubber $10 gloves that you can buy at the big box stores. Waterproof and the rubber grips the wet bars nicely.

Alright then. I'll avoid lobster gloves because I place a lot of importance on individual finger dexterity; but otherwise, good stuff here.

All that leaves is socks, which of course will likely go to wool. I'm pretty sold on the "Warm when Wet" thing ... cotton sucks.

I'm a big fan of my defeat wooleator socks (woolie boolie is one model I have), and there's another that's super warm but goes most of the way up my calf. Not thinking of the name off the top of my head.

I'm a big fan of my defeat wooleator socks (woolie boolie is one model I have), and there's another that's super warm but goes most of the way up my calf. Not thinking of the name off the top of my head.

The other ones I like for when it's really cold (like layering cold) are these (https://www.nashbar.com/bikes/ProductDisplay?langId=-1&storeId=10053&catalogId=10052&productId=208945&summaryOnly=true#ReviewHeader). They are quite tall though.

When the air starts getting cold. I use simple cotton jersey gloves that you see in convienience stores for $1.50. They keep my fingers comfortable down to the 20's. Anything lower then I switch to the Loki mittens. An excellent mitten that protects my hands when it gets below O degrees. These mittens will surprise you with their warmth. When I need a liner I just add on the jersey gloves. Works for me.
Socks in winter ? I like a good quality wool hiking sock. Look at the Redheads at Bass Pro Shops. I've got four pairs of these. Warm and comfy. They feel like little pillows on my feet.