With option 2 your sonos experience will be seamless (according to the manufacturers marketing department). Selecting the room with sonos will turn the receiver on, select the input and control volume. As far as i can tell your video sources will still require you to use multiple remotes or a programmable remote.
Option 2 also gives you the typical "media room" topology (SOURCE/AVR/TV) so if the sonos feature isnt reliable you could turn the AVR on with a universal remote and then use the sonos app to control the connect. This is what you would have to do with any "regular" receiver.
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