David,
Actually I'm Peter, my father was Poul (That is how we spell it in Denmark)
To answer your question I have tried a few, PS Audio as well as the ones form Synergistic - in my system I detected no difference between them and the industrial grade ones that I use.
If you look at my system you can see that I have taken the electrical wiring of my listening room pretty seriously, I have 6 dedicated 120V lines and 2 ea. 220V lines, all fed from the main panel in my house, all the outlets are fed via 12 gauge romex. The feed to the rest of the house was moved to a separate sub panel
I am not a subscriber to the power cord craze either, I do agree that you have to have a well constructed cord with quality connectors that offers a solid point of contact. Beyond that I will maintain that any changes in sound quality are imagined between various high quality power cords. I encourage you to think logically about this, depending on your installation you can have 100ft plus of romex wire, and if not a dedicated line, you can have up to 13 outlets on that line (that's the code) with up to 5 load bearing devices attached (code too) .
The last three feet of cord, if of good quality and with good connectors, will have little, if any, impact on the current delivered to your amplifier.
As always, Good listening,
Peter