Don't bother with the bi-amplification on any model of receiver. It's just there because "everyone else is doing it".

I do have to applaud Axiom for removing the dual set of posts from their new V3 speakers. They've long stood that bi-amping does nothing, but shipped speakers with the option built in, as a contradiction to themselves. Now, with the V3s, having the extra posts added means a 10 day wait is added to your order, because they are not normally assembled that way.

Pioneer PDP-5020FD, Marantz SR6011
Axiom M5HP, VP160HP, QS8
Sony PS4, surround backs
-Chris