I tried the BIS Audio Maestro (www.bisaudio.com).
Small company from Montreal.
Excellent products at reasonable prices, relatively speaking.
The Maestro is their top of the line Power Cable and holly smokes is it ever good!
In my system it puts the Cardas Golden Reference to shame:
It has the smoothness and musicality of the Cardas but on top it gives tones of ambiance and inner detail. Quiet passages are as dramatic as musical ones. and Sound floor level is much better (you do not have to put high volume levels to ake your speakers come alive, the stage does not crush as you lower the volume level).
Excellent cable but one Caveat:
It should be used with Solid State amplification, preferably bi-polar.
Other wise the "tube bloom" it adds could sound a tad slow and it could be too much of a good thing.
Try it out if you have a chance.