Paul Hynes Power Supply Owners

Paul Hynes offers annealed copper or fine silver cables to carry DC power from his power supplies to a component - in my case 15V/2.0A to a tube DAC.

Looking to hear from Paul Hynes Power Supply owners who have made the decision to buy copper or silver, or better, owners who have compared the two.

2. Any other comments welcome.

I am planning to purchase his standard SR4 model but with a 15 volt output in place of the 5 volt output. The fine silver cable is only ~29.00 USD more than the equivalent annealed copper but I really don't want to purchase both for comparison if I can get some direction from others.

Here is one relevant review:
Post removed 

Buy the gold, it generally sounds better than the copper in this application.  See what i just did there?
Post removed