Why are you buying 2? You said that this was for a gaming system and as far as I'm concerned you can only play games on an odd number of monitors. This is because with an even number the middle of the screen gets placed at an intersection and is really hard to play.
With an odd number (1 or 3) you have a center monitor to put your primary forward view on (crosshairs, gun, etc) and the side monitors for peripheral vision.
Also, nVidia cards and older ATi cards are not able to map monitors together for gaming. You'll need an HD5xxx ATi card or a Matrox Triple Head 2 Go adapter to do multi monitor gaming (the Triple Head 2 Go must have 3 monitors, ATi's Eyefinity can do many different configurations).