I can wall mount the speakers, but it's finding a wall mount capable of holding the speaker up but at a 90-degree angle toward the listener. I'd have to mount it on a side wall.

How close would you recommend mounting them to the TV? Reading the speaker placement article by Alan suggests an angle of 22-30 degrees. Using geometry, that means about 4-5 feet from the edge of my tv.

M22v3;VP150;QS8;Hsu VTF3-MK4 sub