Which main power cord?

This is just a heavily biased personal value judgement .
In many high-end systems, both the manufacturer and dealer expressly recommend bi-passing any power conditioner and plug directly into into the wall plug on a dedicated power line for maximum performance .

If you have to use a PC because of wild power swings in say, an old apartment, then matching it to the PC pore cable seems best IMO, simply because anything up from the PC cord is a mismatch / waste anyway because of the filtering effect of the PC and its power cord.

If you can bypass the PC, then I totally agree with JAFOX to tailor the power chord to your system: the amp one may -- and frequently will be -- very different from the source power cable.

There is NO substitute for an actual test drive in your system. I went through about six recommendations (dealer loaners, amigo loaners ) before settling on the two power cables , and yes.... They are VERY different.

Two of the six contestants sounded like crap in my system, but performed great in my buddy's system.

System synergy matters ... Big time.

JAFOX .....

Great final post !! IMO You are correct: a vertical integration of product offerings may or may NOT work best.

Again .....

(1) It depends ......, and
(2) you ain't gonna know until you actually test drive it --hands on -- in your system -- full stop!
(3) to assume otherwise, with sole or primary reliance on either mag reviews or these anecdotal personally heavy biased plugs of one's own faves here, is a lousy odds gamble at best with negligible assurances that the "faves" will actually work in your system.

Release the hounds! .... Let the hunt begin....

"... Ayre designs their products to be used with the stock PC. I tried quite a few PC's on my Ayre components and found the stock cable was the best sounding...."

REGA, NAIM, LFD, LINN do also.

The REGA Couple cable built to their specs by KLOTZ in Germany is a high -end cable that comes standard with their Osiris amp and Isis valve cdp.

Personally and hands-on in my "A" system, I A-B'd many external power cables and I always went back to the REGA stock cable as a superior performer.

Curiously, they bested the $1K+ top Furutech with its gold plated plugs,; the top Oyaide cable, Cardas, Ecosse modded with the top Furutech connectors, and Atlas among others.

The Furutech, LFD, and Ecosse perform admirably in my "B" system

Again, the takeaway is that system synergy - including tailoring cables - matters.