B&W 802 Diamond Stands

I recently purchased a pair of the B&W Diamond 802's. I am extremely pleased with the speakers and when I listen in nearfield (7' away and 6'5" spacing between the speakers) they do great in my 16 x 14 x 10 room. However, if I widen the distance between the speakers a bit and move the chair back a few more feet I get a more expansive and coherant presentation, but some occasional bass overload.

So I am wondering if the supplied tip-toes will make a material difference or some stands (Sound Anchors) will help the overload at all. Room treatments really aren't an option given that the room's walls and corners are pretty well covered and/or filled up.