So I have Comcast digital cable and an original ReplayTV. Works nice, but I want to go HD. HDPVRs are all expensive and subscriptiony, so I thought I might buid a Myth box since I happen to have a spare power sipping AMD64 3000+ laying about. I could go with a pci cable card tuner, but then I'd be paying to make the cable box redundant. I can just use the firewire on the digital cable box for basic cable and channel changing, and it also has a nice dvi output just asking to be captured. All I would need to get is a dvi input card and and one of those ati video cards that supports a component output adapter. (I have an old component only HDTV)
But... google didn't come up with much. Any ideas on where to source a 720p capable dvi-d input card? Maybe with rca audio input as well.
Actually, If I can get a cable card HDTV tuner to work with Myth cheaper than a dvi-d input card, that would be okay too.