Most people forget that these high end speakers are designed around hi-fi amplification, which is generally more potent than that of an AV receivers.
Personally, I'd single wire with better cable rather than bi-wire with lesser cable. Also, single wiring at this point leaves you open to a bi-wire upgrade later on. Initially, some Chord bi-wire links might be worth an investment too.
David
Frank Harvey Hi-Fi Ltd - now on Facebook (search Frank Harvey Hi-Fi)