Nordost SPM Reference 6 ft. pair.

This is very fast, clean, and detailed. Not good on bright systems. There is a blemish on one cable that I took a close up of. 
Here is part of a review from Soundstage Magazine.
So you innocently cable up your system with SPM interconnect and speaker cable expecting some nice clean dynamic sound. What you get is something very different. You get to find out just how screwed up other wire is. My heart nearly broke. All those years listening to wires that sounded like that when I could have been listening to wires that sounded like this. If only someone had realized how screwed up audio wires were 20 years ago, we’d all be 20 years of enjoyment richer today. The congestion, confusion, lack of balance and general lack of finesse of other wires was startling. I’m not referring to $100 interconnects and $200 speaker cables either. I’m talking about $500 - $1,000+ interconnects and speaker cables in the $1,000 - $2,000 price range from manufacturers with well known names, great reputations, and lots of glowing reviews. SPM Reference interconnects and speaker cables revealed these other wires as unacceptable, period. I’ve never had anything quite like this happen during a review before – one product simply blows out everything else you have ever experienced before. The improvement is significant, easily audible. Anybody can and will hear exactly what I heard. There is no subtlety to it. You do not need "golden ears". You do not even need particularly good hearing to recognize the difference. It is totally and completely obvious.