With HDMI or Components? I'll try to explain why I am asking.
If all the channels on cable were in HD then you would just connect the DVR to the AVR via HDMI. Since not all channels on cable are in HD, and your receiver (say the Pio 1018) doesn't upconvert HDMI but only passes it through but it does upconvert Component, would it be better to connect the DVR to the AVR with a lower level connection like Component cables so the AVR can upconvert the non-HD channels? Or is it best to connect via HDMI and let the TV handle things?