First Lite's original Kanab pants (I have no experience with the newer 2.0 version) will fill all but possibly your durability requirement. They are very well built, but are of a lighter weight construction, and could be prone to tears. That being said, if you're good with a needle and thread, you should be able to repair any minor short comings, and they'll last you for years. I am not easy on my clothing or equipment either, but I have no idea how rough your terrain is. I have hunted hard for two seasons in my Kanabs, wearing them almost every hunt, and they are still in excellent shape! They are extra comfy, and ergonomically designed. I like them so much, I'm going to buy another pair! Maybe try the 2.0's.