In reply to Sharp:
Thanks everyone for suggestions.
I tried Berghaus Deluge again and they were even hot under the jeans while standing (I might have added that I survived in a sleeping bag with extreme rating of +2 over last spring and summer, without a mat and in levels up to 900m - I prefer cooler conditions and I like going light as much as possible).
The same problem with mentioned Sherpa pants. These feel great, but quite heavy and felt too warm (would be great for winter only, though).
Something I have never seen was Rab Xiom pants. 3 layers Pertex Shield+, lightweight (270g), tough enough and ¾ zip made me to decide within minutes. They also have articulated knees and internal storm flap, with cords on waist and ankles. It looks like it's a new model, so that's a quick review of Rab Xiom trousers. I'll give a go outdoors quite soon and I'll see how they preform.