I've been using the 4K 43" Viewsonic VX-4380 for several years; it's been great. It uses flicker-free backlighting unlike the Dell 43". Unfortunately it appears COVID-19 has disrupted the supply chain for these at the moment. Keep in mind that many 43" 4K displays use TV-like BGR subpixel layout instead of RGB, so subpixel antialiasing for font rendering in general won't work unless you either switch your OS to BGR or disable it. (Windows and Ubuntu/Gnome, but not Mac OS, have a way to set BGR layout. But all three let you disable subpixel AA.) I always disable subpixel AA anyway because my eyes can see the color fringe when it's enabled and I don't like. Another poster said you can use a TV instead but I don't recommend this. Using a TV over HDMI can lead to color quality issues unless you are certain your model of TV won't be affected. (Many TVs use a compressed color signal because it's good enough for watching TV and movies but certainly not good enough for rendering detailed artwork). And TVs can have overscan issues (edges of the screen image missing), image ghosting issues, etc. A TV works OK for fullscreen gaming or for a powerpoint but isn't necessarily the greatest as a general purpose monitor.