RE: Predator answer for Davidmil
For more utlility and to be able to get more "usability" out of it in a broader spectrum? Yeah, I'd go with the Wolfskin as well... The wool is really super nice, just limited in its applications -- at least for me in the Midwest. But I can tell you I do appreciate it on those really cold December and January sits.
When the temps are above 30, I'll wear my usual stuff with the military's ACWS polypropelene underwear beneath, and I do just fine.