Hmm... I also agree with you people, which wonder if an upgrade to a faster graphics card would help and if you perhaps already are CPU limited.
One way of checking the "status" of your current system is to play around with resolutions for a given game. For example, lets say you normally play UT2004 at 1024x768. Try setting the resolution to 512x384 and see where your framerates go. You will not probably go much above that, no matter how fast video card you upgrade to.
You can also try upping the resolution one step from what you are usually using. If the framerate drops a lot, you would probably benefit from an upgrade.
I know this doesn't tell *which* new card you should get. But if your low-res test shows that your CPU can deliver double the framerate, then a good balance could be to upgrade to a card that is at least double as fast as your current one.
In my own system I seem to have a pretty good balance right now, with a 9800pro(xt mod) & barton@2.3Ghz.




very nice review Anand, it's quite astonishing how fast technology can grow isn't it? with the "top" cards of the last generation being eaten by this generation's top mid card... i'm looking forward to your next review when you have your vanilla 6800!