If you want the best bang for your buck, in my opinion, you have two options.
One is to go cheap. For personal use I buy Visio displays, and have had nothing but success. I never connect them to the internet, and use my PS4 as my media player.
The other is to buy a commercial grade display. This usually means no media apps at all, but they are designed for 24/7 operation. Look for something advertised as a digital signage display.
As the other poster mentioned, OLED is supposed to have better contrast and black, but I’ve never noticed much of a difference.