Video Card Advice

[Shifty_GMH]

I am looking into buying a new video card. I would like to purchase a card that allows me to play with unit sizes on huge with graphic settings on high. Currently looking at the following three cards, but am open to suggestions...

ATI X1650 Pro
http://www.newegg.com/product/produc...82E16814195031

ATI X1600 Pro
http://www.newegg.com/product/produc...82E16814102678

XFX GeForce 7600GS
http://www.newegg.com/product/produc...82E16814150166

Looking for 512mb card that has to be AGP 4X/8X (not willing to upgrade to PCI-Express yet)

Also considering 256mb cards that have 16 pixel pipelines instead of 12 (like those listed above)

BFG GeForce 7800GS
http://www.newegg.com/product/produc...82E16814143046

My system Specs...
Intel P4 3.0E Prescott (3.0 GHz) with HT
ASUS P4P800-E Deluxe
1 GB (2x512mb) DDR 400 PC 3200 Corsair RAM (looking into getting another gig)
ATI 9800 Pro 128mb video card
300 GB Samsung SATA HD
Antec SP-500 (500 watt) Power Supply

Looking for some feedback... Thanks in advance.