I decided to treat myself to a 20 inch BVM for 14500 yen. It's perhaps a tad on the older side, and who knows how many hours it has logged on it (I'll find out when it arrives). Anyway, my thinking is that if the picture is better than my 29 inch consumer HD-CRT from 2003, I'll splurge and get the best BVM I can afford while the getting is good. If it's not, I'll buy another HD-CRT set as backup.
Japanese Sony HD sets from that time have a custom, region-exclusive RGB input called AV Multi, and console games through this look really good. There is no lag or scaling weirdness like I've seen on other HD sets, and the quality overall is better than RGB I've seen on other consumer sets that are SD. However, the image is so sharp that it's kind of harsh. For example, the clouds in Green Hill Zone of Sonic 1 look a bit jagged. I'm hoping that the BVM can keep the vivid color and quality, but also soften things up just a bit.