ATI Theater 650 TV Tuner
 

"The ATI Theater 650 is easily the most advanced dedicated TV tuner we've had the chance to look at. Image quality is excellent and the product is extremely easy to install. Setup under Windows XP is about a couple minutes, and after a reboot you're almost ready to go. It takes some configuration depending on your video feed, but we did not have any installation quirks under XP or MCE. Those of you eyeing Vista on the horizon will be happy to know the card is fully supported by the upcoming OS."

http://www.viperlair.com/reviews/multimedia/ati/650pro/