I'm currently looking for a decent video card for under $100. I've been out of the PC game for a while now (switched to Mac about 5 years ago), but I've got a PC now that I'd like to use for gaming. It's nothing special - just a 2.6ghz P4 - but I just want to play HL2 now anyway, so I don't need state-of-the-art hardware.

I don't want to upgrade any of the rest of the hardware, just the video card. It only has an AGP slot, so I need to stick to that. Also, it'll be driving a Dell 2407fpw.

Anyone have any suggestions?