About six years ago I discovered a little known interconnect called "Stager Silver solids", made using pure solid core silver wire in Teflon sleeves.
The performance of these cables is astonishingly good. Totally accurate and transparent, every detail and nuance of music passes through it without hindrance.
I've recommended it to several others who appreciate high-end quality sound reproduction and they have been similarly impressed.
At the Silversolids.com website you'll find dozens of user evaluations and rave reviews - many reviewers bought and kept them. And the best part is: they're very reasonably priced and offer a 30 day satisfaction guarantee.