Nicole, i think best card for old system - 7600, they cheap and support Pixel Shaders 3.0.
Sure, you can take something more powerful, but anyway you need make full upgrade, when CryENGINE 2 come, so, i don't see any reason to take something more powerful for less than year ...
Also, maybe closer to Christmas nVidia announce new low-end 8xxx for AGP, but them didn't provide any info about that ATM.
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