I'm assuming here that your sources are then DirectTV and the DenonDVD. The best option for hookup would be SPIDF or RCA-style digital. Toslink would be second.
I'd run all the HDMI connections directly to the TV. Then I would run the digital SPIDF to the NAD and switch the audio through the NAD and switch the video from the TV.
A simple way to do this instantly would be to use a Logitech remote and setup both the TV and the NAD to auto-switch to the correct inputs based on activity--like "Watch DVD" or "Watch TV"
I'd run all the HDMI connections directly to the TV. Then I would run the digital SPIDF to the NAD and switch the audio through the NAD and switch the video from the TV.
A simple way to do this instantly would be to use a Logitech remote and setup both the TV and the NAD to auto-switch to the correct inputs based on activity--like "Watch DVD" or "Watch TV"