@whipsaw Have you experimented with vibration control yet? I found the addition of the IsoAcoustics GAIA made a noticeable improvement, to my ears (they fit well with the dedicated KIM stands).
I used Gaia's on my KEF Reference One's with very good results, and had planned to try the Stack Auva's on the KIM's. I sort of fell into an intermediate solution while tuning the speakers to my room. I am fairly tall and initially the soundstage was presenting fairly low, so I did the natural thing and raised the front footers to angle the speakers up. This raised the soundstage, but over time I realized it was messing with the timing. I know that sounds crazy, but these speakers seem to reveal even the smallest change. Anyway, I backed that out and made sure the speakers stands were perfectly level, and instead put them on some 3/4" slabs of limestone I had laying around, as most people do, and put soft fiber furniture gliders on the bottom of the stone to insulate it from and to and protect the wood floor. Wow, what a change! It really tightened things up. I may still go with the Auva's, but they are fairly spendy, so it is not part of the immediate plan. I use their Ethernet Regenerator with good results and have great confidence in their products.
I have been tweaking/voicing my system over the last couple months, I have not had a speaker reflect changes to this degree. It has been a lot of fun.

