Hi
So if you are really wanting it, get the monitors you planned to get and run at lower res for now. Most likely for good frame rates you would probably have to run at something like 1280x800 at 60Hz (x3) anyway and your monitors should be able to do that just fine.
Since I have never experienced live 3 monitors, I'm wondering if it still looks pretty good at 1280x800 at 60Hz (x3)? I'm not a graphics snob and often turn extra settings off to get a more fluid performance.
I usually run race/flight sims but like to run around in games like CoD and C&C.
However I would not be opposed to running it at a lower resolution to experience 3 screen immersion at the 3840x800 , or whatever the resolution would be for that setup.
I'm sure my current setup of a box on XP with an e6600 dual core, 2GB ram, and 8800GTX card could handle 5040x1050 anyway. I'm not sure it could handle 3840x800 for all I know. It works fine with most things I run at 1680x1050.
I do plan on upgrading to a new rig at the end of 2009, but for now I was looking into this 3 screen setup since I had access to two more similiar monitors.