Pong might drag you down a bit, try flash games for now :P
Nah, Depends on what kind of games you like. Here's a few of the games that I have on my taskbar at the moment (I put DX11 next to the appropriate ones since you got a DX11 card:
Dragon Age: Origins
Batman: Arkham Asylum
Modern Warfare 2
Team Fortress 2
Dirt 2 (DX11)
Left For Dead 2
Battlefield: Bad Company 2 beta (releases in March. DX11)
Originally Posted by Slaymate
I like Racing games. NFS Shift is pretty fun if you have a wheel and pedals.
Dirt2 won't read the steering wheel I bought which bums me out, I'm going to get Shift and try it since you are like the 10th person I've talked to who said it's fun.