One of the massive but invisible differences is the stability of the internal power supplies and the stabilizing control of electron beam current so the monitor is consistent over a long period of time.

Thanks for the info. I'm new and just an ethusiast who would like to do home videos and some shorts. I've already plunked down for a GL2 +accessories and cringe at another $900 for a monitor.
And just for clarifcation, a CRT would allow me to check color before filming and also watch framing and stuff during filming, as well as help me during the editing phase. Correct?

The major manufacturers also make good quality industrial quality monitors that cost around $200-$300 for a 14" unit. These are widely used for editing and may be all you require. Certainly for $800 you would be well advised to purchase an industrial NTSC monitor and use some of the rest of the $ to buy a set of nearfield audio monitors. You can get reasonable stereo sets starting at around $300 for self-powered units. The combination will give your videos a real shot in the arm because your editing will automatically become better. You get to see and hear your production better.