I just bought a New LCD HD TV for the Bedroom. I want to replace my Standard D12-500 w/ HD Receiver. I'm not sure whether I want it to include a DVR, but my questions are as follows for those who know: - Is it as simple as taking the card out of one and installing it in the new/used one? - Once I change the receiver do I need to let Directv know what I've done? - Is there certain models that I need to stay away from or are there certain receivers that work more user friendly than others? I appreciate any insight here. Thanks in advance.