This!!! And I'd throw backpack into that list ahead of scope. Boots, binos, and backpack have a bigger chance of hindering a hunt much more than the difference between a 7-08 and a 30-06.Use the little 7 if you shoot it well. Save the $ and upgrade your boots, binos, or scope (in that order).
Premium bullets in a 7-08 will do all everything you need for anything to be found in CO. I'd bet you couldn't tell the difference between it and a 30-06 as to on game results.