Thenis...I have used the Z3's on and off for many years. In my system they sound extremely neutral, true to the source and quiet. I prefer them to most power cables regardless of price. I get fantastic dynamics, open (maybe slightly forward) and airy presentation with exceptional detail/imaging. If you are familiar with MIT cables, they bring much of the general sonic character of MIT...ie accurate defined images, quiet background and a very you are there sound. The main thing that attracts me to the Z3 is their "trueness". I find many power cables to alter the source which is fun for a while but detracts from my goals overall.
In my opinion you can't go wrong with a system wired with them. Good luck on your quest.