Looking for the Best Digital Power Cord

I just got a Channel Islands Audio PEQ 1 mk 2 phonostage with the separate power supply which requires a 15 amp power cord.  I have shunyata Zitron viper cord to get me by for now, but I’m looking for a well shielded cord to give me the darkest possible background and as little RFI.  I could buy a Shunyata Sigma digital power cord, but would welcome any suggestions from those who have gone down this road before.

My current ref config:
clearaudio ovation woody TT with tri-planar tone arm and Ortofon A90 cart (koetsu rosewood signature is out for repair)
Ypsilon MC-16 SUT
oppo/modwright bdp-105d transport
aesthetix Calisto eclipse pre
aesthetix atlas mono amps (switching to AUdio Research in Jan when winter arrives in Jan - 24 tubes gets warm)
von schweikert vr-5se speakers

i am currently using harmonic technologies pro 9 ref speaker cables
shunyata anaconda XLR interconnects from pre to amps
grover huffman top level rca interconnects on the phono/analog (ypsilon SUT to phono to pre)

I am also utilizing Shunyata Research power distribution on everything but my amps (triton v3, typhoon, DP-6)

I welcome all comments that are in the spirit of polite discussion.

thank you in advance...