LucRaymond, I agree with the earlier posters. The fronts look too high, get them lower and get them away from the walls - a foot at the very least, ideally more. The center definitely needs to be flipped to sit on its straight side, so that the front grille is perpendicular to the shelf. For the rears I would use QS speakers as backs anytime unless you have 5 feet or more in the back behind your sitting position and use them ALWAYS in 5.1 setup (sides). Are you sure you cannot mount them on the sides of your room - about 2 feet from the back wall and about 1-2 feet above the ears level would be what I think is optimal. Not sure what is on the left side of the room in the back - is it open? Otherwise your "side surrounds" will be in the back and much shifted to the right relative to the fronts.
