My usual winter pants are softshell pants. They breathe great and wick well, not to mention shed snow and light rain nicely. I use the REI ACME Pants, but there are tons of options from Marmot, Patagonia, Arc'teryx, and the like.
I feel like waterproof/breathable pants are more necessary in shoulder seasons but less so in the winter, especially when I dig out my tall gaiters.
If you're really dead set on WP/BR, try the REI Kimtah pants, which are made of eVent and a bit lighter than the Taku. The pockets are mesh-lined, so they vent, and eVent material is significantly more breathable than Gore-Tex and REI Elements.