A reasonably nice true 4:3 monitor with 1600x1200 resolution. I use mine hooked up to occasional retro PCs with VGA, and to my MiSTer FPGA board.
MiSTer settings
There’s a config file on Gist here. The critical parts are the timings:
video_mode=1600,64,192,304,1200,1,3,46,162000
And that the screen supports vsync_adjust=2, which means we get things like 59.9Hz refresh rate in the Playstation core (with the slight disadvantage of flickering and blanking when changing modes a little more than an original CRT might!).