I have DISH satellite and receiver (non-HD) and a 6 year old RP Sony 53"XBR and a 1 year old Panasonic 32" HD-ready with some kind of built-in line improvement--not really a doubler, but it seems to work well as the picture is much clearer and better defined on the Pannie. Can't say how much is do to size and how much to technology. That said, I still do most of my watching on the Sony. I guess size does matter.
