What power cord do you like most on your amp ?

Wywires on my Classe or Macintosh monos.  It does a lot and very little at the same time.  Brings a level of quiet and refinement but does not emphasize any frequency like so many others I have tried.

I've owned several Classe amps and always used Nordost PC's with them with excellent results.  I would look to the used market if you go with Nordost.  BTW.... I have 2 CPCC's Top Gun Specials that have been in a box in my garage for over 10 years....not sure what to do with them. 

Audio Note ISIS cable with Furutech FI-50 NCF connectors.  Tube electronics.

Problem solved. No, I didn't get another Purist Dominus, I almost accidentally got Purist Aquila Praesto Revision, not current Luminist Revision, power cord that was specifically designed for digital with superior shielding. No fluid or ferox or contego. So I put Dominus back on the amp and ran Aquila from the wall to the regenerator. It's 12 gauge cord. I don't know what Jim Aud, Purist designer, had in mind but this thing works great where it is now. I also tried the other way around - Dominus from the wall to the regenerator and Aquila on the amp. That was also better than what I had before but nowhere near the current arrangement. In this system the place of the Dominus is on the amp. I didn't even try Aquila on the phono and cd player, another Top Gun works well there, though Aquila might be better. I rarely use cd player so I just move power cord and interconnects, once every three/four months.
Very unexpected, this cords and cables experiments can be very rewarding.