For comfort in most "normal" hunting conditions, for me, it is a toss-up between prAna Zions and FirstLite Kanab 2.0's but, durability goes to the Zions. A close second to the Zions IMO are Cabela's Trekking pants. Any one of these pants do well with medium to heavy-weight merino wool base layers even in colder weather. Also, they are all pretty quick drying should they become wet.
In really cold weather my favorites are fleece lined, Mountain Hardware Yumalino pants, or my old school, heavy wool pants made by Big Bill (Codet's) out of Canada. The latter are probably too heavy if much hiking or stalking is involved. I've used both of these pants in really cold weather and, again with merino wool base layers, I find I stay warm, even when setting/glassing in very cold weather. It never hurts to be prepared for whatever weather conditions you might encounter, if possible. Good luck!
