Here are some suggestions:
Try adding absorption to the first reflection points on the ceiling and bass trapping in the corners to get better resolution. I couldnt see you side walls from the photos of your system, but they should also have absorption at the first reflection points.
Remove the equipment rack out from between the speakers to get better imaging
Try a Richard Greys Power Company 400 Pro to clean incoming power
Try speakers with dual mid-range cones to eliminate the congestion
Try adding absorption to the first reflection points on the ceiling and bass trapping in the corners to get better resolution. I couldnt see you side walls from the photos of your system, but they should also have absorption at the first reflection points.
Remove the equipment rack out from between the speakers to get better imaging
Try a Richard Greys Power Company 400 Pro to clean incoming power
Try speakers with dual mid-range cones to eliminate the congestion