I am disinclined to recommend AQ if you are not using a Niagara power conditioner. I have found they tend to perform best wth a Niagara and are not quite as great if you don't have a unit that uses the same grounding system.
If you are looking for silver, Stage III Aegir or Trydent Power cords would be a good match. They tend to be sanely price. Aegir are $2k for 1.5M and Trydent is $4k. Silver can get pretty crazy in terms of price pretty fast. I work with the distributor on Wilson Benesch products and I know he uses their PCs with Ypsilon gear so they are pretty awesome.