We're going to need a budget.

How is your wiring? Sufficient amperage may require multiple dedicated circuits for the amplifiers.

If I had the money to shop for amps, I'd probably start with Axiom, Emotiva, Outlaw, Parasound, Odyssey.

If I were you, I'd definitely buy 9 channels of amplification.

Perhaps 2, 2 channel amps for the mains and a five channel amp for the rest.

bibere usque ad hilaritatem