One Cord To Rule Them All

I experimented a little with power cords for PS Audio Premier regenerator.
In descending order: older Purist Audio Dominus Ferox - best. Unfortunately I need it for the power amp. Then Purist Audio Aquila, Wywires Silver Digital, Custom Power Cord Company Top Gun, PS Audio don’t remember the model, something old and inexpensive, and finally $15 14 gauge shielded cord bought on ebay. So I have Purist Aquila on the Premier. The Wywires gave a little clearer sound but soundstage collapsed by comparison. Aquila is 12 gauge cord designed for digital equipment but it works quite well there.
Yes, power cord on PS Audio regenerators matters a lot. It is not only about passing the current, shielding is very important too. The cleaner the current entering the regenerator the less work for the regenerator, I guess, and the better the outcome. Some people put various conditioners in front of regenerators with good results, but I am not there yet. Some even plug one regenerator into another.
$300 will buy something that should be OK but I would spend more. You would have to try a few cords.

As above, the Nordost Blue Heaven,  is a good PC at its price-point.

Happy Listening!

A used kimber pk10 gold would be a very good choice or about the amount of money that you want to spend.

I would talk to Cap over at Audio Envy, ask him to make you a Mega Power Cord. It can deliver 20 amps of continuous power. I think they're about $300. The performance upgrade of using this in my PS Audio Power Plant was a bigger improvement than the initial Power Plant; I couldn't tell you why.

I have two PowerPlants. One is a P20 and I have that fed by a AQ Tornado HC cable I got at a discount running from a Shunyata wall outlet fed by a 20 amp line direct from the breaker box. I also have a P12 which is fed by a Shunyata Venom V2 HC cord to a PS8 which is then connected via a Shunyata Delta NR to the wall another Shunyata outlet as above. The reason I don’t have an even more robust cable on the P12 is because the receptacles on the P12 are close together and I the plug would partially block an adjacent receptacle. I could also use a Shunyata Delta EF cable there.