The keyboard really is the worst part of the vt220. I’d probably use it a lot more if I could use a better keyboard.

Yeah the problem with the 220 is that it's a special keyboard bus. There's probably Arduino-based PS/2 to DEC keyboard bus available.

I think the 320 was one of the nicest ones, it's really compact and has this old terminal look. My VT520 is technically much better but it looks a bit like an old PC monitor :)