Single wire is good. Bi-wiring that much better - eh, I dunno. Bi-amping - now we're talking, maybe (well, at least according to Elliot Sound Products and sites like that). The flexibility is probably worth something plus if you can bi-amp (and TIA moment - I haven't bi-amp'd VR33s) you might find something you'd consider worth the price of admission. Maybe start with http://sound.westhost.com/bi-amp.htm and research more from that?
