I am very interested about your conclusions with the Mano using the i2s output.
As for power cable, after trying 7-8, this one is the best so far:
https://www.ebay.ca/itm/Furukawa-PC...AWG/222573597421?_trksid=p2485497.m4902.l9144
Other sellers have similar products but this one is worth paying more over other varations. The gold-plated plugs seem to make a difference. He should have the european version as well. Can't find it, he does not ship to Canada anymore so i can't browse his articles.
Oh, this post is about i2s cables.... Sorry, when i saw Pangea, i jumped in..