HI IVAN! I OWNED AN 850 AND USED THE CARDAS GOLDEN REF ANS THE AUDIOTHRUTH DIAMOND. IT DEPENDS ON WHAT YOU NEED.IF YOU WANT WARMTH AND WEIGHT GO CARDAS,IF YOU WANT AIR AND RESOLUTION AND TOP END,GO AUDIOQUEST.
P.S. I ALSO WOULD CONSIDER THE NEUTRAL REF FROM CARDAS.
HOPE THIS HELPS,ORLANDO.
P.S. I ALSO WOULD CONSIDER THE NEUTRAL REF FROM CARDAS.
HOPE THIS HELPS,ORLANDO.