I'm researching either building or buying an HTPC. It's beginning to look like the technology for one of the key ingredients I want is just not quite here yet. If I go to the expense of an HTPC, I'd like for it to be my PVR--to pause live TV, record programs, etc--so that I can trade in my expensive cable PVR settop box for a much cheaper one. The problem is that I want to be able to do this with both my standard and high-definition programs, whether they are the unencrypted network HD channels delivered by cable or premium channels like HBO. But all of the HDTV cards that I have looked at state that they only work with over-the-air (OTA) HD broadcasts. I'm sure there must be a technical reason, but I just don't understand why the output of my cable box, in my case the three component TV cables, could not be fed into the TV tuner instead of into the TV set as they are now, and the output of the TV card fed into the TV set. I've tried without success to get an answer at the leading HD TV tuner card manufacturers like ATI. Anyone have an answer? And I hope the answer is that I've misunderstood the tuner card websites and it can in fact be done.