Dan Brennan wrote an answer about The North Face Varius Guide Jacket - Men's on December 20, 2011
If you want to use it in the extreme cold, buy a north face with zip in compatability, (Denali, nuptse, red point etc.) with the Nuptse, you could probably go well below zero with no problems.
The jacket is windproof by itself and the Nuptse is a 700 down-fill. Awesome option.