My own home brewed Carol 12ga/3 rubber jacket from Home Depot, Leviton 20A plug from also from Home Depot and cheapest Wattgate ICE on the other end feeding my PS Audio P600, the outlet is the original PS Audio 20A outlet of which I think they are now call "Classic" The reason for 20A plug and outlet is that my previous apartment has 20A outlet, sadly my current apartment doesn't have one
If you ask me... don't go crazy and spend big money on this. Yes, I have tried a few cords and some pricey ones. They do have they own sound, but at the end of the day I pretty comfortable going back to my cheap home brewed power cord. Maybe because I have been using this for over 12+ years now. Yes, I also made my own speaker and interconnect cables for my system too.
But if you are going buy, look for a place that let you return them if you don't like them. Good luck!