Yeah but you have not addressed aC noise yet. That will be the next major upgrade and I don't mean buying a line conditioner.
In my case AC noise is not an issue. The Levinson 33's and the 32 both regenerate their power.
My electrical service to the house was upgraded to 200 amp with a high-quality industrial panel. I did spec a new grounding rod as well when this work was done......brass clamp.
No power conditioner I've ever tried here on the other components which may benefit from it has made a shred of difference. My friend has the Richard Gray unit, on his system the difference with it in the system is immediately noticeable. We brought it here and nada......of course his service has never been updated and contains some nice glass fuses!
Best,
Paul :-)