I'm not going to argue all your points as you seem to have fallen head over heels for the Best Buy upsell, but I just want to set the record straight for anybody reading this...
The Z1R uses silver plated oxygen free copper wire
, which is more expensive than the pure oxygen free copper wire, and significantly more expensive than copper clad aluminium wire (CCA) (
https://en.wikipedia.org/wiki/Copper-clad_aluminium_wire) which is commonly used, and most ebay/amazon sellers use when advertising pure oxygen free copper wire; I recently returned 2 reals of 12AWG pure oxygen free copper wire and this was after confirming with the vendor it was 100% real pure oxygen free copper wire and I would test it. The real copper 30m real cost $25/33% more, and a number of vendors admitted their 99.9% OFC was in fact CCA.
If anyone wants to cut their "junk" original Z1R cable, and show us some strands and cross section I can tell you if it's junk or not.
Debating cables is like debating religion or crypto, and I made my point previously on this thread... but know this; the audio signal both up and down stream from the cable will be going through mostly tin (Sn).