What's the best PCI graphics card available?

[ultimatebob]

One of my friends made the mistake of ordering an el-cheapo Dell PC with Intel "Extreme" graphics and NO AGP slot. Now, they want to play games like Half Life 2, only to find that their PC doesn't cut it. What PCI graphics card upgrade can I recommend to them that would help?

 

[StrangerGuy]

The best PCI video card I have seen is Inno3D FX5700 256MB 128-bit memory, but I'm not sure where to get it though. My friend with a Dell Dimension 3000 was also in the same situation as yours when he wanted to upgrade his video card.