I didn't take your poll because it's hard to narrow it down to a single rifle with the information you provided. Of the above calibers, I'd lean towards the 30-06 and 300WM.

Are you hunting with a guide, friends or solo? What's the terrain and elevation like? Are you using horses, quads or just footpower. If you're hunting with a guide or friends, they can tell you what to expect in terms of terrain, length of shots and if you're using horses, quads or just hiking. If you're going solo, that's something you'll have to figure out. In general, you might want to extend your usable range to 400 yards. It's great if you can get closer but sometimes it's just not in the cards.