We just purchased a new HDtv and our tv does not need a cable card to receive the HD channels. Now DH wants to get an HD tv b/c the channels we get OTA in HD are so beautiful! We are back to watching "regular" tv after being spoiled with our TiVos for over 6 years!! So... would we need to get cable cards eventhough the tv does not need them? Or are they b/c the TiVo needs them?? I am so confused How much are they? Do we buy them or rent them??? FYI: we have WOW in Ohio and right now have digital cable with a Humax hooked up to the new tv.