Swissboy - I have the new Pizzey & Knight (7th ed.) and think it's great. Been some criticism of the "brownness" of some playtes but I think it is an improvement over the previous editions and (still) the best Australian field guide. Shame though that it, like almost all Australian ornithological literature, has no information about indigenous knowledge of Australian birds.
My advice - buy it and then come here and see the birds.