This may not help with your setup. I switched away from expensive and unreliable TVs and went with an HD projector about 8 years ago. You can throw it small on a small wall or huge on a large one. Picture is crisp, the downside is that 120hz motion is not an option, but 720p or 1080p is easily. The Epson I bought as an upgrade a few months ago was around $600.
My brother in law has an 80" TV that looks no better than my cheap-o projection setup! I think he also spent about 14x as much! Admittedly a 79" 4K TV now runs a mere $4200 at Frys and it would be much sharper than my projector.
You have to use it with a cable box, and a darkened room is desirable but not 100% necessary.