No one else has mentioned this, but I saw you put down the straight and angled options for both scopes. Angled gets my vote every day of the week and twice on Sunday. I have a Swaro ATX 85 and it gets used off the pickup window (also in KS) quite a bit more than anywhere else. Sometimes it takes a little bit to get used to using an angled, but once you’ve got it down you won’t look back. I especially like the angled when I am sitting in my pickup because I can rotate the scope eye piece to either side and comfortably look almost 180 degrees out the window.
As far as the Kowa 77 vs the TS 65, I would personally take the Kowa 77. My buddy has one that I looked through side by side with my ATX 85 and I was impressed with it. I think it is good middle ground between a 65 and an 85 if you’re planning to use it for some hunting where you’ll be carrying it a lot, and other hunts glassing from your pickup or not going far with it.
Good thing is you’ve narrowed it down to two really great optics, so no matter what you choose it will work out for you.