T221 is a great monitor......while not ideal for you high frame rate FPS type games it's brilliant for Flight Simulator and such like.
And you can run it off one video card......most of the Quadro FX cards can run it by using both of the DVI headers.
The DG05 version of the T221 has an external adapter that allows you to run two cards (all 4 DVI headers) into the monitor.....that allows you to support 3840 x 2400 @ 47Hz without too many problems. (OK I know you all want it to run at 100FPS but trust me 40 FPS is ample for many games).
I agree that $17k is high (the initial IBM launch price was $35k but they dropped to $6k soonish afterwards), you can pick these up on E-Bay now for $2-3k and if you want a high real estate monitor they're fantastic. As a Linux monitor they're unbeatable....so many windows....so little time.