Ebay sometimes had good ones, but the best place is stuff like craigslist or whatever local-ish websites (I'm not USA so I don't know really). There's also no real list of what CRT is good or not, so you will have to google the specs if you find something good.
Some good series are Trinitron, Diamondtron, Electron Blue, Multisync, Vision Master Pro. But in 2000, for example, most CRTs were capable of +100hz, so as long as the display is functioning well you can get a nice refresh rate. Some harder to find ones are capable of 200hz or more, but they are really hard to find...
Also just so you know the majority of CRTs are 4:3 or 5:4, there are some that are 16:9 (the gdm-fw900 comes to mind) but they are usually more expensive.
Finding a good crt isn't something you can usually do quickly, it's a lot of lurking and luck. So if you are really eager to upgrade quickly, maybe have a look at some local websites and do a bit of googling, and if you can't find something nice then go with LCD.
This article lists some more nice models:
http://www.tomshardware.com/reviews/comparison,440.html
Iiyama 454 is probably the best CRT ever made, but good luck ever finding one :3
Last edited by ImmortalPig; Nov 8, 2015 at 04:57 AM.