I'm a super senior(80+)and can relate to your problem. Early on I used 7x, then later went to 8x, then went to 10x, all were quality binoculars. I'm still using my 10x but last year I bought a pair of Vortex Kaibab's in 20x which I use on a tripod or window mount. I really like them and I use them instead of a spotting scope and sometimes use them instead of my 10x power binoculars. They are very clear and don't seem to tire my eyes out and gives me a lot better field of view than my spotting scope. It sounds as if this might be over your budget, they're about $1100, unless you have some connections. If you do you could get them for about $800. I've had them for over a year now and I can honestly say it was money well spent, even though my wife doesn't think so.