computer geekery related

[metabomber]

I still have an AGP 4x/8x motherboard on my game PC. I am not about to build a whole new system, but I was wondering what video card would allow me to squeeze the last drops out of this 'antiquated' architecture.

I was thinking an NVIDIA 7800 GS. Anyone have any thoughts?

Rest of the stats on the machine are:
2.8gHz HT p4 chip.
4x512mb Corsair 3200DDR
Unknown Make "330w" power supply.

Thanks!