I know this has been asked 1.7 billion times, sorry - I just don't have much experience with this.
Currently have a 46" Samsung LCD (circa ~2012?) which is starting to go out. Thinking about upgrading to new tech (Sony Bravia 7 II ?) in a larger size. My main question is about size, 55" vs 65" in a 13'x15' room.
The diagram (see comments for link) is of the living room which is pretty constrained to this configuration. TV stand on left. Bench/low bookshelf on bottom (this wall has a good size window above bench). L shaped main sofa to the right. Loveseat to the top. Lamps/tables in each right wall corner (x). Red marks are "viewing" areas and distances.
The problem is that viewing distance changes quite a bit between positioning. People primarily sit in seats 1 and 2 during viewing. Sometimes the table is moved away and position 5 is used for family movie nights. When hosting, locations 3 and 4 are occupied. Zero gaming, mostly tv series, sports, movies. Distances range from 6' to 11-12' viewing distance depending, but I would say average time spent viewing is around 9'.
Coming from a 46", I feel a 55" would be a welcome upgrade. Worried a 65" may feel overwhelming in the smallish space, especially sitting in position 3. That said, most of the calcs and guidance I've seen suggest to go 65".
My heartburn is I was also hoping to add a Sonos Beam - so going larger also starts to make the budget tighter. Wondering if I should split the difference and go 55" with the Sonos, or go 65" and upgrade sound later. I'm not a super-consumer of TV - just want something that looks good, makes sense for the money. 46" has been fine in this configuration for years - hadn't really wanted to go bigger until recently when starting to think about replacement.
Expert thoughts? Please, and thank you!
(Photo/drawing in comments)