Try Kimber Select 1010 (or newer 1011) as a cost-comparable high-quality copper offering from the same manufacturer. Same "staging" characteristics as many other Kimbers, but smoother (copper) and less zingy than the KCAG. Also way better than the "hero", which is really a forgettable cable in my opinion.
The Select 1010 or 1011 would be a way to try copper sound in a direct comparable without changing the soundstage positioning and characteristics much - I've owned both (long since went to 1010's and don't miss the KCAGs one bit) Both have the same "house" presentation in terms of soundstage depth + positioning, but the edge is different, with the Select 1010/11 being softer and a bit fuller. I have used both with tube and SS. I also use Analysis Plus Solo Crystal Oval ICs - again same rough price range, and a bit softer than the Kimbers, but a little less robust in the nether regions.
