The PC-TV351 by NEC is a cut below the holy grail of PC-TV monitors - the PC-TV455. But actually, the difference is not that great. It has most of the same connectors; the PC-TV455 offers an extra AV input, and it shares one of those inputs with an S-video input, but if your primary goal is computers, this isn't really relevant.

The tube is gray rather than the jet-black tube that the PC-TV455 boasts, but I am not sure exactly how much, if at all, that impacts image quality. Perhaps gray offers less contrast? Black levels may be higher than ideal? The actual video output doesn't really look that way, though. And the sync rates stop at 24kHz, so it's not a good choice for either the X68000 or FM Towns. But for me, it works with almost everything I have available to throw at it. Here it is running a mish-mash of PC-8801, X1 Turbo Z, FM77AV, and PC Engine software.