G'day mate, that receiver is comparable to the AVR-3805 here in the states. That's some nice equipment you're putting together. Being that you're down under, it's difficult recommending products because we don't know if they are available. Two brands that may be available might be Rotel & Anthem, both very good amp manufactureres. You'll want to size the amp to the size of your space, but the RF-7s are really sensitive so the amps power can be scaled back a little.