You have to determine what your intended purpose of these "optics" are. If it is a casual look on the mountain, then perhaps a 20x set of binoculars would be best. If you are looking for optics to really "glass" at long range, then there is no substitute for two high end optical spotting scopes assembled together in a quality bracket.
That being said, I have never been satisfied with the optical quality, so to speak, of a high power binocular utilized for glassing long hours. Out here in the East, we have been assembling these "big eyes" for years. Some have chosen to use the larger spotting scopes with the 80mm objectives, and some have chosen to go with the smaller scopes. I have put together a few different combinations over the years, and have settled on the somewhat smaller ones. I wanted to be able to pack my glass on my back, when we hit the mountain for a few mile trek to our hunting spot. I have been using the now discontinued Leica APO 62's with the 20x60 eyepieces which actually end up being 14x48 on the 62's. The optical clarity, color retention etc are absolutely killer with these scopes. No matter what brand you choose, I would suggest using the straight eyepieces. With the high quality scopes, and a properly constructed bracket that collimates the scopes, one can glass for hours or days without any eye fatigue. Yes, they cost a bunch of money, but it all starts with being able to actually see in detail what you are looking at.
Read about my sets here:
http://www.longrangehunting.com/forums/f17/got-glass-138531/