Thanks for sharing your experience. Next, you may want to try adding absorption panels behind the speakers. Start with a few, and see what you think: perhaps you will find the imaging more precise, and the sound less bright. Whether that's a desirable characteristic for your system will have to be determined by yourself. There are many places that sell sound absorption panels.
I started off just placing absorption panels directly behind both speakers, and I appreciated the sonic improvement, so I placed absorption panels on the entire back wall (with bass traps in the corners). It does make the sound quality less bright, but more detailed. It might dull the sound too much for some systems.