I don’t know if it can serve as a reference, I hope, but I have the Epic References, which are the ones that replace the Epic Xs (the only change in the cables is the new dielectric, kind of a new material patented by Chord; and I do not know to what degree it can affect the character of the cable and the sound).
I had them during 6 years, and until very recently with NDX2>>MF Nuvista 600 Integrated Amplifier>>ProAc K6. IMHO, a fantastic cable with some weakness in the treble, which is compressed substantially to open in mids and basses; the run in time, I imagine quite similar in both models, about 100 hours at 95%, about 200 hours full.
Currently I’ve upgraded them to TQ Silver Diamond…