How did I miss this thread?
Background: I have a quite large room w/vaulted (16 ft) peak ceiling, ~25 ft by 28 ft. The large TV viewing sofa is a little more than 1/3 of the way from the front wall, where a long/low cabinet holds my LG OLED. The seated viewing position is maybe 10 ft from the screen. It’s 77".
Re this: "Sitting on chairs at Best Buy, I tape measured 11 ft from the 55”, which looked small, while the 65” looked too big at the same distance."
Nothing about what you saw at Best Buy matters nearly as much as what you see in your own space. And my experience has been--go large, as large as you can, and you’ll never regret it.
In my big room, the TV doesn’t exactly look small, but it also doesn’t dominate the room. In a smaller room, a 65" can look somewhat dominant. But all that vanishes when you sit down to watch. 65" is IMHO the minimum screen size to trick your eyes into being impressed. But even bigger can work well so long as the room and furnishings permit.
I would gladly have an even bigger screen if the cabinetry permitted. But 77" is max, and I love watching that big OLED. BTW, I’ve research that very same Sony OLED and read some rave reviews of it. LG & Sony are the only OLED brands to seriously consider IMHO.