@rick_n , I read your suggestion elsewhere and thought it worthwhile. I have the speakers on IsoAcoustic footers and they are aimed as high as I can get them; it helped. I've played with toe in versus straight ahead and it makes a subtle but not big difference, but every positive step is a win. Thanks.
I am coming to accept and understand that the Coda is doing what a high quality amp should: present ALL the music. My dilemma is whether I want to hear it all, or sacrifice some highs towards a more relaxed sound.