If you know your house wiring is questionable, and you can ascertain background noise in your system when no signal is being put through it, a good power isolator is a perfectly logical investment. I have a medical-grade power isolator for my gear. The box is a foot square and weighs 35 pounds, because there is real pig iron in that sucker. It didn't cost 5 figures like what it appears you spent on all that Nordost kit, but hey, if that works for you, then cool. I spent $600 on that thing, and it was a worthy purchase.
In my experience, there are "auxiliary" (I use that word for lack of a better one) items that can improve your experience. But I'm definitely in the "diminishing returns" camp. I participated, years ago, in a double-blind A/B test between basic 16-gauge lamp cord and $1500/m audiophile-grade speaker wire to the same set of speakers. I was able to correctly identify which one was in use 65% (13/20) of the time, so there was a difference. But the difference wasn't all that dramatic, even before ear fatigue from listening to the same music selection over and over again set in. No one who took the test that day hit 100%, except one guy who nailed his first attempt and stopped the test after that.
I'm sure some feathers will be ruffled by this opinion, but hey, we all take our own paths through the audiophile maze, I'm not judgy about people who spend top dollar for every aspect of their system. If it makes you happy, do it.
The upside is, all those auxiliary items won't need to be replaced should you decide to swap out a component in the future. So you can kind of mark them down as "done". Right?
In my experience, there are "auxiliary" (I use that word for lack of a better one) items that can improve your experience. But I'm definitely in the "diminishing returns" camp. I participated, years ago, in a double-blind A/B test between basic 16-gauge lamp cord and $1500/m audiophile-grade speaker wire to the same set of speakers. I was able to correctly identify which one was in use 65% (13/20) of the time, so there was a difference. But the difference wasn't all that dramatic, even before ear fatigue from listening to the same music selection over and over again set in. No one who took the test that day hit 100%, except one guy who nailed his first attempt and stopped the test after that.
I'm sure some feathers will be ruffled by this opinion, but hey, we all take our own paths through the audiophile maze, I'm not judgy about people who spend top dollar for every aspect of their system. If it makes you happy, do it.
The upside is, all those auxiliary items won't need to be replaced should you decide to swap out a component in the future. So you can kind of mark them down as "done". Right?