The current set has maybe at most 1/2" bezels all around. Anything bigger would require choosing which portion of the show to see and which portion would be out of range, like sitting front row at the movie theater. The current set is even slightly too big after rearranging our seating.
Worth noting that 99% of the actual information and content of programs new or old occurs in a square to the center of the screen.
+/- 5” won’t make a bit of difference.
Getting a “high end” set in 50” or smaller is getting more challenging as the number of options is quite small at those sizes. It’s almost to the point you could grab a curved monitor and a sound bar if you want high end features packed into those sizes instead of a “tv”
You might consider bumming around the Avs forum if you want to geek out.
Also worth noting more important than size if you are in a micro home is viewing angles, some of the very high end sets have mediocre viewing angles compared to some of the low end tech, so if this is an issue make sure you check out the thing in person
Heck getting a true 1080p screen 20-30” requires you to target used TVs around 10 years old because they only make 720p sets in those sizes as loss leaders. 40-50” is now in the value spectrum similar to a 32” tv 15 years ago.
As for me I’ve been happy enough edging towards to mid or lower end of the market with Vizio sets. YMMV. but ignoring apps a Vizio will be fine if you can get the color balance correct.
The higher/mid range are all Sony/Samsung/LG each with their own set of potential issues.