Re: 20-45x65 or 20-60x80?
I've got the Swaro 20-60x80, and I'll second what Broz said. Best use I've got from the 60x was checking out the full moon, on a clear cold Wyoming night at about 9000'. Midday antelope same trip, and mirage even at 20x got tough. Get a best quality optic, and either is workable.