The cable you want is Crimson, not Clarus Crimson. Austin Hifi is the US distributor, and they offer a free trial, I believe 30- or 60-days. I compared them to WyWires, Gabriel Gold, Cardas, and PAD Acqueous Anniversary when I was in the market and thought they were easily the best. (WyWires was a close second). They are exceptionally "clean" sounding. If you want clarity, resolution, and dynamics, they are fantastic and a bargain. If you are looking for tone controls, you probably won't like them.
I also found that I liked Crimson ICs more than their speaker cables. Clear Day Double Shotgun speaker cables were just as good the Crimson speaker cables for higher frequencies, but the Clear Days were better for bass response.