Biwire Cables for Vandersteen 2CE Signatures

Hi all.  Trying to make a cable decision...  Richard Vandersteen recommends "true biwire" (i.e. "double biwire") cables, and suggested trying audioquest.  Audioadvisor will build audioquest cables to order, and can build two pairs of Rocket 88 cables for double biwiring (without DBS battery system) for around $1000.  The other option is two pairs of Purist Genesis Luminist cables, higher retail cost, but could get used.  So apples for apples costwise. Running with a McCormack DNA 0.5 Rev A amplifier.  Any suggests?