current exchange rate makes Australia very expensive. Fine if you are looking to stay there a bit and work. But there are great alternatives.
South-east asia is amazing and much much cheaper. Thailand, Vietnam, cambodia, Laos - amazing places (someone mentioned Siem Reap, Angkor Wat - amazing place, went there for my honeymoon in Sept 14)
Must admit I travelled Oz, NZ, Asia, States, South America some years ago, but I live by the lonely planet guides (even used them for my honeymoon recently), they advise good places to stay, places to eat for all budgets and advise on VISA and other things to look out for.
Flights - STA, travelbag, trailfinders all good places to start.