Suggestions on upgrading from a Kimber Kable D-60 digital coax.

The D-60 runs between an Aurender N100C (the latest N100 with digital coax) and a Schiit Audio Gumby.  I am looking for a cable with warmth and detail.  My favorite IC's are Purist Audio (between the Gumby and my Rogue Cronus Magnum and between my phone pre and the amp).  Price range is $400-$500.