The comments above referencing Prana Zion Stretch answer your question. Also , Eddie Bauer First Ascent Guide Pro's are really nice and can be grabbed for a peach if you watch for sales (wore a pair of them in Slate Green on my September MT Elk Hunt)...Costco also sells a pant for ~$20 the Union Bay Tech that are built pretty much the same way. You can search reviews in this forum.
http://www.rokslide.com/forums/clothing/71159-prana-zion-pant-alternative.html
I have tried KUHL and own a couple pairs of the Rydr's but they are heavy durable cotton more like an amp'd up Carhartt , the others styles didn't fit me well.
I have both the Costco pants and the Prana Zions. I love both pants for everyday use. Probably use the Costco ones more, for everyday use. BUT in a hunting situation I would never choose the Costco pants over the Zions. The Zions just seem a touch heavier, which to me makes them feel more durable and quieter.