When I got my first 55" LCD flat screen I wished I could have afforded a 65.I have had no TV since 2007, I was thinking that 48" would be fine in the living room (viewing distance 9 feet [can make it 12 feet but that is NOT a permanent spot for the couch, as it causes the front door to be a labyrinth the moment you step inside. & a 32" monitor (up from 27") on my desk top computer in my office.
I owned that 55 till the 75s became affordable and jumped to that.
Till the 85s became affordable, guess what I did..
The dang 100s are near affordable now but the space at the front of my room isn't wide enough to
get a 100 between the speakers so that's it for me..
But like music, the more immersive the experience the better, and so it goes with screen size.