All I can add to this discussion is that in the Danish ATC academy we use Barco 32´screens, with a lot of flickering and such. My believe is that they have a refresh rate of about 75 hz, which really seems too low, considering we use them daily for up to 8 hours. In the ACC and APP they use SONY screens, totally square, and the picture there is much better, actually deadstill. My instructors often complain af the low refresh rate in the SIM, and when you compare it to the real stuff, you would agree. Howewer the cost of our Barco screens is some 15-20000 Euros. For that kind of money, quite alot for just a monitor, I believe you could ask for more.
Just a thought...