I Have a 47" Panny (HDTV Ready)and I need some help with some very basic HD Tuner/Reciever Questions. There are quite a few :b I want to send my Basic Time Warner Cable signal into my TV as a 420p or 1080i signal. Is this possible with a store bought Tuner/Reciever? Which is is Tuner or Reciever or both? Is there a Tuner/Rec. with Multiple inputs available? Multiple Outputs? I rent the HD tuner box from the Cable company which I use to play the 6 HD Channels they offer, why am I not able to use this box to upgrade regular cable signals into HD? The way I see it is that this box is might be the difference between a reciever and a tuner. Tuner upgrades the signal to HD where a reciever merely recieves the signal and transports it to the TV. Would I notice a difference using a Tuner/rec. to upgrade the basic cable signal from the basic signal going in? Would I be able to give Time Warner there HD box back and just use the unit I buy to recieve the HD signal and send it to the TV? If I got an Antenna to show the 6 or so channels I get could I run it through the box and upgrade the signal to HD and send to my TV? I use my Xbox as my DVD player (For now) could I send the signal into the Tuner/recieevr and send a HD signal to my TV, and would I notice a difference? Baiscally what I'd like to do is send the video signals from my Cable box, Anntenna (If I ever get one), and DVD player into this Tuner/Reciever upgrade the signal to HD and then send it to my TV. So what I would see as a perfect machine would be a unit that can take multiple signals and either have multiple HD outputs or a single HD output conver the basic signals to HD and send them to my TV. Any such animal?