Power cord with DVD and AVR

Has anyone tried a high end power cord with a DVD player, AVR, or prepro? It would be necessary to use an adapter so that an IEC cord could be used with the two prong AC input on these.
I have, it is called the Ice Cube cryogenically treated adaptor that lets you use a standard IEC cord with these devices. Audioquest and some others also make specialty AC cords that are teminated in the special plug and do not require an adaptor.