While I do not have much experience specifically with high end ICs, I have heard some very good systems taken as a whole. In my primarily Margules-based system the KAS Audio Maestro interconnects have absolutely shone. I have a .5 meter run of the Maestros between a Margules Analog-Digital enchancer and a Margules hybrid integrated amplifier (tubes at the pream-amp stage) and the results are fabulous in terms of clarity, dynamics, weight, depth, resolution, and extension of bass and highs. So, yes, I do consider the KAS Maestros an exceptional product. Remarkably, these interconnects do what they are claimed to do.
