I have been very happy with the Audience powerChord on my CX-7e (mind you I'm using a PS Audio Power Plant and not a Shunyata Hydra as my power conditioner). I previously used the bottom-of-the-line Shunyata Venom cable and it didn't do the job - it bloated the midbass in my system, in addition to a less "clear" sound through the entire spectrum.
I'm sure the better Shunyata power cables are another thing entirely, but I haven't heard them.