Thanks OP for the post. Good luck with your future mods. Yes, intergraded are in no man land for conditioning as all amps go directly to the wall.
Nelson Pass is at the top of my audio hero's and not only doesn't endorse any cable manufacturers, but he also disregards tubes as well.
Absolutely tune the room, positioning and equipment first.
This is NOT an endorsement for Denafrips nor does it address sound stage directly, just what naysayers want... some type of proof:
https://www.youtube.com/watch?v=cSN5UjCA4Zc
Audioquest's take on supplying power cords with their power conditioners:
Niagara Noise-Dissipation Systems do not ship with an AC cable. Why?
"The cable that feeds any power product is the most important AC cable in the audio/video system. For any power product to maximize its ability to dissipate noise, the attached AC cables must be Direction-Controlled to drain induced radio-frequency noise. AudioQuest AC cables include ZERO-Tech for uncompressed current transfer and optimal Noise-Dissipation. Further, our patented GND-Tech (Ground-Noise Dissipation) pulls RF noise out of any product it’s attached to.
When partnered with a Niagara power product, our Direction-Controlled AC cables create a complete Noise-Dissipation System, ensuring the most effective and efficient dissipation of RF noise.
We allow our customers to select the appropriate length of cable for their systems and to decide how completely they’d like to optimize their Niagaras."
This is not an issue here for most, but it is a long held fact that your best/highest quality power cables should be on your front end. Sub's benefit the least.
I do agree with several members here on Shunyata power distribution/power cables. They are a no brainer but far from my price range. I DIY all power cables.
An interesting tidbit from the manual for an Audioquest Niagara 1200 power conditioner:
"The Niagara 1200 has a five-year warranty, but it was designed to last for over two decades. Provided that the Niagara 1200 is used inside a home, store, studio, or office with a reasonable climate (45 degrees to 100 degrees Fahrenheit, with less than 20% humidity), it can be left on continuously; there are no parts that will wear out."
While I live in Reno, NV where current outside humidity is a normal 17% now, it is 50% inside as I use a water cooler. I grew up and lived in the Midwest my first 40 years and <20% humidity.... NO WAY LOL!