Hey Headcrab....
I would recommend the ACEDVIO from Canopus. It is a PCI board that accepts analog composite signal and stereo audio. I have them installed on about 5 XP systems and they all run flawlessly. I have them running through Sony Vegas, and they natively capture to DV-25. I believe they are about $300.
Another recommendation would be an Osprey 230 card from Viewcast. Be aware these DO NOT natively capture to a specific codec, so you will need to specify a codec in your capture utility. I learned this the hard way when my hard drive space was being eaten alive by an uncompressed live show capture using Sony Vegas!
Regards,
Jeff