I've got the Vision Master Pro 510, and I think it is great. I compared many monitors visually in the stores before buying this one. The only thing close in quality are some SONY monitors, which are more expensive. The Diamondtron NF True Flat CRT tube is very sharp and has great color saturation. You need a really good quality video card (i.e. Matrox) to take advantage of the higher resolutions and refresh rates, though. That is one reason I went for the (better value) Iiyama; so I had money left over to buy a worthy video card. I have only noticed the phosphor persistence during the starting sequence of some games where the screen is blanked for dramatic effect before panning their logo or title across it.
See the AnandTech review:
http://www.anandtech.com/showdoc.html?i=1097&p=1
"the Pro 510 also uses Mitsubishi's DiamondTronTM CRT. The result is breathtaking clarity, and precision of anything that is displayed on the CRT. "
I have 2 Iiyamas now, and I think their display quality is top notch, but I hate their controls. Actually, I don't understand why reviewers have not complained more about the lame controls. There are only 3 buttons to control everything. That did not keep me from buying another one, though. I spend more time looking at it than I do adjusting it.