Rich,
I have the Fascination cables (introduction to the revolutionZ line). The overall tonality is better (in my system, to my ears, etc.) and they are more dyanamic. Both of these qualities - great tonality and being very dynamic - are (to me) the heart of the KS sound. Just very open sounding (unobstructed). I found the same qualities in their power cords and speaker cables. In short, the KS are very natural sounding and allow me to hear lots of nuance without artificial brightness. Once I had them burned I could not find the strength to return them.
So the rapid slope went like this: PC, speaker cable, IC.
I believe they are copper cables. Some folks believe silver has a brighter sound. I tend to believe it is all implementation, but I do like these particular copper cables. I agree with Carl -- just so many variables, too many.
I also like the KS upgrade policy. Trade up within a year and you get 95% of the returned cable. Personally, I love being able to move up the line like that. No huge investment up front. You can check them out and see long term (so important) how they do. I think that some dealers also have evaluation cables that you can try out. I haven't heard the Emotion level for ICs and speaker cables, but I found the Emotion PC to be true to its name. The speaker cables and IC had a greater impact on the overall sound than the PC.
Shep,
Glad the Grovers are working out for you. I did break them in for a very, very long time. Couldn't get rid of the slight elevation of the mids. Not a big deal, mind you, but it got me thinking about the KS once I had their PC and then the speaker cables. Probably just the old nemesis: wanting to try something different.
Phil