Given your description of the setup I would say go with another set of QS8s.
Personally, I wouldn't want direct radiating coming from above at an angle at that short of a distance. They will have a directionality to the sound and make the range of seating positions quite limited. The diffused nature of the QS8s will create a much better overall "ambiance" with less directionality. With the direct radiating in those positions it will always seem like the sounds are coming from above even if they aren't supposed to. If they were lower and further away behind you then direct radiating would probably work fine.
