Thank you for giving us the update.
I skimmed the string again. you have great equipment, but… Long term, I think you would benefit moving to tubed equipment. I am an Audio Research fan myself… but ideally what you want (I was finally able to get there… income had much to do with it) is components that perfectly reflect the tonal balance of your tastes… then choosing completely transparent interconnects becomes the objective. I have worked with many of my systems just like you are. But after forty years at working at it… I finally got all high end tube equipment and they sound simply spectacular… I got rid of all the Cardas… it has a slant to warm side and always suppresses the details. Good in most systems.
Maybe when you get some time go listen to a Conrad Johnson, Audio Research, VAC, or Cary tube system and see if they are not fundamentally more in line with your tastes.