Speaker Placement

[Tenny80]

Samsung Q90R 65" TV
Klipsch R-500C Center Channel
Cambridge Audio Aero 2 L/R Speakers (will change eventually but sound good for now)
SVS PB1000 Subwoofer
Onkyo TX-NR797

Room is roughly 10' x 20' the one side of the 10' is open to the kitchen, the other side is patio door and a gas fireplace. Because of this I have the TV centered on the 20' wall and the couch and lazy boy on the other 20' wall.

I have ordered 2 pairs of Polk Audio OMW3 to use as rear surrounds and atmos speakers. I know they are not the best speakers but it's the only one my wife hasn't mind the looks of. The room is our main living room, I wont have a dedicated home theater room until a kid moves out haha.

My plan is to mount the Atmos pair at the ceiling pointed down 6' in from each side, giving them 8' apart apart. The rear surrounds will go at ear level and in 3' from the ends of the walls giving them 14' apart. Does this sound like the best way to do it?