In reply to An Triubhas: with you required spec the question would be how warm? reinforced knees are not necessary if whole trouser is tough enough
Powerstretch I dont find quick drying
most good trousers have some water resistance, you have to maintain this though normally (nikwax them)
Montane terra pants are always popular but not what I would call warm, their alpine pant is a bit heavier, I like these
ME Ibex pant
up in price is Mammut base jump,
plenty out there around the 70 to 80 quid mark