Read the other threads about cables here and decide for yourself if they matter as much as the marketing departments say they do.
As for my experience with IXOS, I did a system for someone in '07 and we discussed cables and how much he wanted to spend. I thought most was BS at that time but some of their descriptions sounded plausible, so I told him I could get some of these to go from the Low Z output on the preamp to his power amp, which only has Low Z inputs. I got them and was pisssed. No name XLR connectors, a pearlescent white nylon braided mesh covering and three wires that were braided. The box was the nicest looking part of the whole thing and I couldn't hear any difference between them and my old Audio Technica mic cables. Since I do critical listening all the time, I was definitely not impressed and gave my rep an earful about what was expected vs what was delivered. I offered to return them and my client just said that I should leave them in place.
A $400 6' pair of cables that have about $20 worth of materials (I'm being generous here) is not what I consider a good product.