I tryed the Diamondback; it's an OK power cord for the money. You might want to try the Emotiva power cord; I think it will surprise you.
Has anyone tried the Shunyata Diamondback PC?
Currently breaking-in 3 Shunyata power cords, I swapped them with PS Audio AC-3 cords. I have heard different opinions concerning this cord and would like some feedback from other users of this cord or what they have learned about it. The price of the cords was $125 each, about the most I can afford.