I owned Cardas Golden Reference and tried Quattro fil in my system. I slightly preferred the QF because it had more speed and extention then the CGR. I kept the CGR for a while and then found a cable that in my system was better than both—Stealth PGS. The Stealth possesed the great mids of the CGR but, added noticable more resolution and extention at the frequency extremes. Unfortunately as we all know, it comes down to personal taste and system matching. I would seriously give the Stealth PGS a listen. Good luck.
Jim
Jim