BD Alpine Pants with capilene lightweights underneath for backcountry ski trips day or weeklong. You can roll up if too hot, they eliminate need for gators to a large extent, plenty of pockets. All at a not so reasonable price. But they last a long time. Just don't climb some crappy chimney in them. [There's no reason to climb a crappy chimney in anything come to think of it. ] Well, anyway, mine have made it several weeks of wear while wind shells seem to get holes in them fairly quickly and after a decade or so the coating comes off the inside all over everything.
It's all a temperature regulation thing anyway and these just won't work well for some and will be the answer for others. It is just too bad they are so expensive for people to try and find out.