I recently got A mogami cable, w3173, which is bulk cable that is not available via retail due to it's larger guage. Not sure why they don't offer this retail.
It is regarded as one of their best audio cables. I found someone to attach RCA connectors. And for about 12 feet on each side it was about $150. I compare this to a cardas clear cable for a couple thousand it was a hell of a lot better. Super clear and did not get in the way of anything.
cardas cables I believe are designed to color up the sound which can be nice for some people. But if you have a good preamp you don't need to color up the sound with a cable.