The two Steves and Bivyhunter are absolutely correct. When you go to the vast mountain regions for creatures such as sheep, goats, moose and others, you don't want to be without a good spotting scope! I prefer my Swarovski HD 20-60x80mm, but my best friend got the 80mm Kowa and loves it. He took it on a moose hunt and got one of the top 10 biggest ever to come out of the Yukon. He would never have seen that moose without a large, powerful spotting scope that could resolve the moose from miles away. A spotting scope may bulky and somewhat heavy, but compared to traveling mile after mile in difficult, rough terrain in search of trophy animals, carrying a spotting scope is a breeze. But the highest of quality at very substantial expense is required if you want a scope that will do the job well. That 60mm Kowa would be an excellent compromise when an 80mm scope is too much to carry. I prefer Kowa, Swarovski, Zeiss, and the latest Leica because their optics are "clearly" superior. I do have the small folded optics Leupold, and it is fine for many purposes, but it certainly is not the equivalent of the finest scopes, like those I mentioned. It's not fun to plop down $3K on a scope, but on a $20K hunt, it can be the difference between success and failure, and may be the best money you could ever spend. Remember, great optics will serve you well and will last a lifetime. Amortized over 20 years, a $3K scope is a worthwhile expense.
I prefer straight scopes, because they point where you look, but angled scopes have distinct advantages when the angles of the terrain get steep.
Allan