You haven't mentioned any room treatments. For sure I would treat the first and secondary reflection points. I've used GIK art panels and further added Owens-Corning insulation to this with excellent results. My hearing is sensitive to high frequencies anyhow and this made a big difference for me. This will improve the sonics in just about any room and no matter if you change speakers, it will improve your sound. Also agree with the others regarding toeing the speakers straight out and not in.
