Depends how into quality you are. I have a bvm 20f1e, 14e5e, pvm 2053, and a 20L4 and even the low TVL 600 pvm using RGB, seriously blows on a consumer set (and I have used around 5 different consumer trinitrons as over the years). Go up to 800/900 TVL and the quality is outstanding. But it’s razor sharp and maybe not to everyone’s taste. Regarding price, they are worth want you want to pay for them, but remember the horse has bolted regarding broadcast monitors.....it’s very rare to pick them up cheap, nowadays. I personally would have no problem dropping up to £500/dollar conversion, if it was the right unit.
If broadcast monitors aren’t an option, I would go for a cheap consumer trinitron before using a Scaler again. (it needs to be component /RGB,for better image quality). You could get an ossc and a pc monitor, which i’m Sure would look great.
Don’t forget about jvcs/Ikegamis; I have seen soon really nice image quality of various models, but nothing really beats the HR Trinitrons.