For price: Microtex in outfitter camo. Great value when on the annual sale, and a great camo.
For performance in mountains: Kuiu
For good price/performance in colder weather in mountains: Core4Element
For good price/performance in warm weather in mountains: lightest Sitka (on sale)
For quiet when weight isn't a matter: wool. That Swedish surplus is excellent.
For good price when not in mountains or rain: BDU's
I have, use, and love them all. When you've had thousands of feet of vertical gain and drop in changeable weather, the Kuiu seems like very good value. There are some excellent OD and brown softshell pants available from REI, etc. that you can catch on sale if you bide your time, but the pockets aren't as good. Just watch all the synthetic stuff around campfires...
There was an interesting experiment where a world class mountaineer went high with two sets of gear: trad stuff like the early climbers wore (wool, linen, and Egyptian cotton) and the latest and techiest. Somewhat surprisingly, he liked the trad stuff best. Of course, it was all tailored for him, as it was for the early climbers, and he thought the fit was a very large part of his impressions. Also, he was in true alpine conditions, with no rain and low humidity. I think the cut and fabrics play large parts in why I like my Kuiu and Core4Element pants so much, and am less impressed by my Sitka mountain pants (especially for the money, even on sale).