Wool is the best IMO, but since the OP specifically said he didn't want it I guess trying some of the high dollar ski pants may be worth looking into, but don't know how quite or tough they'll be.
I have been less than impressed with sitka and kuiu. They work just fine till you poke a hole in them, which I did on the first outing with several pairs of synthetics. I'd just assume wear jeans and a good set of gaiters than a pair of "high tech" synthetics.
