I'm considering buying a TivoHD, but I'm confused about Comcast's channel lineup and how it will work with the Tivo. I only want basic cable, but I have one HD tv, so I want the HD channels that I could get from an antenna (but I don't want to go throught the hassle of installing an antenna). Comcast lists the OTA HD channels as available in their basic lineup for $16.42/mo (in Houston). However, they tell me I can't recieve those channels unless I upgrade to a digital service package, the lowest of which is $55.99/mo. Why list the HD channels in the basic lineup if there is no way to get them?!!! Maybe I'm oversimplifying, but can't I just order the basic lineup and plug the cable into the TivoHD and tune to the HD channels? I mean, the TivoHD has two tuners and HD capability, does it not? Obviously, I just don't understand. Please help. 2nd question: My HD plasma has no internal tuner. This was no problem in the past, since we just used the tuner on the cable company's DVR. If I decide to dump the cable company and install an antenna, will the TivoHD serve as a tuner the same way the cable DVR did, or will I need to buy an external tuner? Thanks!