Well, I am auditioning the Cardas power cords which came today from the Cable Company. I will have about a week to play them, and then will try the power cords from Virtual Dynamics which should arrive on the 17th.
The Cardas cords already make the system sound richer, fuller, smoother, bolder with more authority. Not sure how I will feel about all this in a week, but right now I am impressed that power cords make such a difference, and I think I like the Cardas sound so far. But, from what I have read here, the Virtual Dynamics may turn out to be even more exciting. I will keep you posted as to the developments and my final choice.