Hi all, New to this forum. I just bought an iMac 24', so obviously I'm considering watching TV, maybe HDTV on iMac. Considered Elgato Eyetv Hybrid, but I have some questions: It seems that it can only receive hdtv content through antenna or clear-QAM (free stuff over the air). Does it mean that if I subscribe to the HDTV content from, say, comcast, and I have to use a cable box to decode the HDTV content, I cannot connect to the cable box to receive true HDTV quality content? I am really confused with its specs, but someone told me the above. Does anyone know whether there is any TV tuner that can make the iMac function like just an HDTV? Thanks!