Voodoo cables LLC.... and Bruce does have a trial period built in... and/or an upgrade option last time I checked.
Voodoo Power cords which have both performance and value. The Gold Dragon was named power cord of the year recently, in an offshore magazine as I recall. I have two Golds, one Black, and a Tesla II as well.
The new Tesla series power cords from Synergistic Research have been getting a lot of positive accolades too since their release, the T2 & T3 respectively... and from one other member who has tried both Lessloss and the SR Tesla cords, prefered the Teslas.
Your mileage may vary though.
David Elrod makes a very special array of power cables too. I've one of his Signature series and I really enjoy what it brings to the table.