I used wire world supernova 6 for digital. Speakers, kimber 8TC. Silver plated banana's. For the analogue IC's I have tried Qed silver spirals, which are smooth but mask a lot of detail. I have tried the carbon van den hul, and find them also too smooth. I've tried making Ag litz cables and had variable results. I ended up with quite a nice set of 0.55 or 0.6 mm diameter Ag wires from home grown audio, terminated with audio note RCA's. I have been pleased with these, and decided to upgrade to home grown audio silver lace, terminated with Eichmann silver bullets.
Big mistake. These are way too bright. Just distortion of the sound. You think you getting detail, but soon realise the base as gone and there loads of grit and sibilance. These were returned for refund, but left be thinking about some copper... Basically because i have been reading the copper vs. silver debate.
So I decided after some scouting about to give the Audio Note Lexus cables a try. Well, I suppose Peter Q. would say the Ag version is better, but pricing is way way outside my budget. I can however report, that these interconnects are better than anything I have tried by a long way....
Some people say that there are no differences in cables... This is wrong.... Others say you justify the improvement after spending a bunch of money... Well, after you've spent some hundreds of pounds, I suppose you do look for the improvement, but this did not stop me from returning the Silver Lace interconnects.
I recommend Audio Note AN-CABLE 1150 LEXUS, Copper version of the SOGON interconnect.