dcjme:
I would be careful routing your video signals through the AV receiver. Foosinho's description is accurate, HOWEVER, not all receivers actually have the bandwidth in their video circuits to handle HD. In addition, by putting the receiver in the video signal path it is very possible that you will add noise to that signal.
My advice is to route your video directly to the TV using a video switch if you need to and route your audio to your receiver. Then, as Foosinho implied, get a good remote for system control purposes.
Good luck!