Well, depende yan sa goals mu. Kung priority mu is career, sweldo and entertainment go for sydney and melbourne. If you want balance, relax, a bit laid back environment go for qld (brissy, gold coast or cairns which is a tourist spot kasi maraming beach resort). Kung sweldo naman and maximum savings go for those mining towns in Western Australia or Rockhampton and Mount Isa in QLD, medyo patay nga lang ang entertainment.
If I have a family of 5 here in brisbane, I think I should be receiving 150K per annum my wife should be receiving more than 100K per annum with a $600/week rent. Pero I think this is a bit exaggerated bec. I'm factoring yung bisyo ko sa IT equipment/gadgets and shopping ni misis. Besides if you have 3 kids, you are entitled to $$$ grant from the gov't. Parang may additional allowance ka to support your family.
Ako lang with my wife, almost 4 yrs na dito sa brissy. Ok naman dito, a bit boring pero it's perfect escape from the stressful life in manila.
Well goodluck, I hope makarating kayo dito sa Aus.