That would shrink my screen down to a mere 80" due to the height of my immovable obstacle to the north, the A/V ducts. But let's say I did that... how far would/should the left M60 be from the wall?

Do larger speakers need to be farther from a wall than bookshelf speakers, as a general rule?

I'm aware that all of my options place the speakers very near the screen, which some people say may be visually distracting. But having 3 M60's sticking out 27" from the wall, all RIGHT underneath the bottom of the frame (38" high) may be too awkward looking... ???