I use Swiss cables reference ...pretty reasonably priced compared to others and is a LUMENWHITE design.
It's a modern day remake of those classic unobtanium Western Electric cables from the 1950s with only natural material used in the shielding and with updated copper metallurgy.
There is quite a bit of tech behind the design and there is now a Reference PLUS series.
Gideon of Acoustics Arts in NYC now carries this.
www.swisscables.com
On another note Lukasz will soon be releasing cables of his own making. The key differentiator will the the cables being subject to high voltage treatment (recall that Lukasz is a specialist of high voltage physics both from academic background and his corporate days). No idea what they sound like, but someone who heard the USB cable was impressed upon initial listening. Worth keeping an eye on, as I think they will be reasonably priced.