I am thinking about upgrading my old HR10-250 unit with a new HDDVR. I also have an HR20-700 on the main TV. I've read just a little on here about all of the new technology available. I'm wondering what should I look for and/or ask for when this is installed. What receiver should I expect? What one would be the best? Will there just be one line required or the standard 2 lines? Will the current dish work? Will the new DVR have an off air tuner input? What about the whole house DVRs? Sorry for all of the questions, I just want to be well informed and get the best equipment/installation I can. And this is the place to go for an education for sure. Thanks!!