I have a Mitsubishi 73" HD TV. I have a PVR 721 attached. There is no way I would ever give up the PVR functionality even for HD. I have been waiting patiently for the PVR 921, but am getting impatient. I heard that existing customers could get the 811 for $199. At this rate I might buy one. Can I put both the PVR 721 and 811 on the same TV? and how would I do this? I also have 2 other receivers in the house.