Long Run of Speaker Cabling

Hello, AGon Folks -

My setup dictates a long run of speaker cabling (about 18') from my Conrad Johnson Premier 12 Mono Blocks to my Vandersteen Quatro Wood speakers. Though not ideal, there is no other way that I'll arrange the placement of my components. 

If anyone would care to give a recommendation for replacement speaker cabling (18' runs) that would do well in this setup I would appreciate it very much. I would like to stay with Bi wiring.

My components:

Vandersteen Quattro Loudspeakers

Van Den Hul Teatrack Biwire Speaker Cable (to be replaced)

Conrad Johnson Premier 12 Mono Block Power Amps

Conrad Johnson Premier 16LS Preamp

Sota Star Saphire Turntable with Benz Zebra cartridge

Conrad Johnson HD3 USB DAC

Innuos Zen Mk. 3 Streamer

Stealth PGS interconnects exclusively

Thank you,

Randy