@Jack_from_BYOAC: I'm in the same boat as yours. I am trying to find a CRT monitor as a companion to my OSSC (coupled with a DVI to VGA converter) after being disappointed in the general state of affairs of the LCD market. While there are lots of IPSes with low lag and quick response time around, they are all sample&hold panels with persistence effects, and I don't want to shell out $$$ for high refresh rates/G-sync/Freesync, which I don't think will work with the OSSC anyway. And I'd rather have a non-widescreen display as well.
Unfortunately I don't have first-hand experience in CRTs (well, I do but it's been like 15 years and I was just a teenager back then) so I've resorted to necro-reading reviews and discussion forums. So while we wait for some more experienced user to chime in, here are some links:http://www.tomshardware.com/reviews/comparison,440.html
(very crude reviews though..)http://www.tomshardware.com/reviews/comparison,497.html
(ditto, but there's the P225f featured here)https://www.repairfaq.org/sam/crtfaq.htm
(very comprehensive FAQ, with a section on buying used monitors)http://www.tomsguide.com/forum/23210-4-pitch-resolution
(this discussion cleared me some doubts about the tech)
I'll refrain to link forum suggestions on specific models as I've read everything and its opposite (even Sony CRTs have unenthusiastic users), it's certainly better to wait for some opinion here. The Viewsonic P225F certainly looks good though - it has a diamondtron tube, those get a lot of praise. I don't know if it supports less than 30khz h.rates for 240p/480i gaming though (assuming you want to retrogame on the thing). What is sure, is that CRTs are not without flaws either, even more so that a decade has passed since they were manufactured. Incurable geometry problems, corner blurriness, hissing, messed-up colors, the list goes on. So as you said, picking up one locally, which you can test to your liking, would be a good idea. Unfortunately there's not much around my area nowadays, so I'll probably end up buying one on ebay.