Power cables are not power conditioners, a good AC power cord would act like no cable at all.
Why would anyone need a 1000$ power cable after you spend 30k$ on power conditioning. I have done this exactly, I'm drinking the cool aid so whatever.
Do you need special cables if you have perfect AC power, of course I'm not talking about in adequate AC cables but decent quality cables perhaps a 500$ AC cable vs a 5k$ AC cable plugging into perfect power? I can't see that it is helpful.