@mitch2 You really know about Oyaide power cords. I like them and their plugs along with Furutech.
However in the value stakes I think Oyaide have it. I have an Oyaide R1 wall socket which is Beryllium Copper, the top Furutech is double the price.
Oyaide market their VONDITA Xe cord as a power (amp) type cord but I've found it's extremely detailed. Putting any power cord on my master clock reveals a lot. It was far too detailed (read harsh) for my master clock.
It's since found it's place on my ethernet optical fiber box, on which it does a wonderful job.