Hello,
I wanted to get back to this question in case anybody else may be interested in this topic.
For those who are interested, I have two NVIDIA GeForce 7300 GT cards in a first generation Mac Pro, in which I was interested in connecting four 24" displays to. I came here to see if anyone had a similar setup in working order before my money flew out the door.
As no one on board here had a system like that, I went on to take the risk and picked up four Dell ST2421L 24" Widescreen LED Monitors and connected them all to my Mac Pro system.
I am more than pleased to say that they are all working flawlessly. The Mac's video settings being all set to the default resolution of the Dell displays, which is 1920 x 1200.
I powered down the computer to move things around and connect them all. Since I have powered back up, I have an uptime now of ten days without so much as a hickup. I also use ARD to vpn into it from home and all is well with that, as I bounce back and forth between them all.
Lastly, I should mention that I am running fully patched Snow Leopard on the Mac Pro, as I seem to remember some talk about problems with Lion and multiple displays. But for me it couldn't have gone better as I have a few PPC apps anyway. I am a very happy camper now with a nice even computer tan going on.
Have a good un,
Tim