And they will not agree this is a good setup. Speaker position and direction matter in almost every system from stereo to 7.1.

Maybe your setup would be ceiling mounts like https://www.amazon.com/VideoSecu-Universal-Satellite-Brackets-Ceilings/dp/B002WN1GOW/ so you can at least get some options on position and direction.

The Polk 80 at https://www.amazon.com/Polk-Audio-RC80i-Ceiling-Speakers/dp/B00006BMQT is a best seller but in ceiling, so far, I would not call that a good experience for surround setups. Maybe it's fine for ambient sound and music.