Speaker cable for Arcam AVR 350

I recently purchased an Arcam AVR 350 to used with Spendor 5se speakers. The Arcam allows bi-amping. I would appreciate recommendations for speaker cable that I can bi-wire at both ends and would match with my equipment. Also, would I be better served by purchasing two separate cable runs instead of bi-wiring one run.
I have a bi-amped all ARCAM FMJ 2 channel system. ATLAS ASCENT speaker bi-wired cables with ARCAM are terrific, and they wow most listeners of the system. Of course synergies are further achieved with with ATLAS ICs.