Atmos Rear Height Question
I know, another Atmos Question...I just bought a house with a nice big loft area, it's 14x22. I'll be using the front half of the room for my theater, so like 14x11. This means that I have the entire other half of the room behind me where I can put speakers and should get great dispersion coming from the rear or height. I'm getting an Onkyo TX-RZ800 and can't decide what to do with the 6th and 7th channels. Currently have Rti 8 fronts, CSi A6 Center, and FXi A6 for surrounds.
So...for adding two more channels for Atmos (can only add two so 5.1.2). Should I do in ceiling above the couch (option 1) or should I put speakers in the top corners of the wall behind me(option 2), so they would be like 10 feet back from the couch and four feet above listening position? Photos of the room are below (listing photos, not mine as it's not furnished yet). The couch will be perpendicular to the closet door and existing couch you see in the photo. Front of theater setup will be where the existing TV is in the photo. In the photo of the rear of the room, I put in circles showing where they would be if I went with option 2. Please let me know!