Placements are best when done symmetrically from what i've found but an asymmetrical placement with the QSx is quite forgiving.
I would not angle the QS8 toward you in any way. It was not designed as a direct radiating speaker so this accomplishes nothing.
As long as you setup your receiver to account for the different surround distances from your listening spot to the speakers, then timing of surround sound should not be an issue. Second to that, use a SPL meter to measure the output from each surround and ensure that the levels are balanced. This way neither surround creates more volume than the other which would bring attention to your ears to one side.
Other than that, try using a small stepladder to move teh QSx around the room in the areas you are thinking about and just give the sound testing a try before permanently mounting them.
