Subwoofer cable for audio system

What IC cable are folks using for their REL, ACI, and the like, subwoofers in their audio systems? Does it need to be comparable to IC's in rest of system or can it be a lesser model?
For my REL Storm high input I am using XLO Pro 600/600S Neutrik from The cable company (
5 meters - $196. Much better then stock cable.
For low input - Monster cable(don't care much).