The cables I used to manufacture (ICs), had capacitance of 3.8pF/foot, lowest in the industry. I am selling my cable business and I have a couple of interested buyers, so they may be available again soon. You could look for them used on Audiogon: called "holophonic-PC. They are very good unshielded silver cables.
The thing to understand about capacitance, is that it is always important in interconnects, but particularly critical when driving from most DACs, because the output impedance of most DACs is much higher than the typical SS preamp. A quick back of the envelope calculation will show that even 10-15 pF/foot in a cable will result in roll-off at 20kHz with a DAC and the more typical 50pF/foot is really bad. I would beware the manufacturer that does not publish the capacitance per foot in their product specs.
Steve N.
Empirical Audio