Opinions on pwer cords for Rowland Model 501 amps

Just looking for some ideas on power cords for these amps.....yes, these are the digital class d amps from Jeff, and say what you want, these are fast, articulate and have the lowest floor noise of some of the other amps I listened to....nice stuff. Your thoughts
I just bought Nordost Vishnu for my new JRDG 102 & Capri. I hope the WOW factor never leaves. It seems to be a great combo for me.
Using the Virtual Dynamics Rev 2.0 on my 501's & 201's.
The very best I have found.