I had moved to my new place in Dec 2016. Yesterday I upgraded the outlets for my Stereo setup. I put in an Oyaide R1 for the main system as well as PS Audio outlet which feeds my REL sub. Boom! Suddenly more detail. But smoother. Also finding I'm running my system at a lower volume. I do plan to try some Herbies tube dampers and am curious about trying a synergistic research black fuse (while I know the rating I'm not sure what size fuse fits in the AR).
I think the AR SP20 and the Plinius play superbly together. I have listened to my systems over the years a lot. And I was always swapping gear but now, I feel I have reached where I want to be. I just turn it on and get lost in the music. I don't over analyze it, don't feel something is missing, or that I have to do something to it, and there is no fatigue.
This is true audio nirvana!
