If you are not city dwellers, there a plenty of suburbs and new estates that you can look at with a budget of $600K. You have a great budget to work with that will definately give you what you need. You could even look at Ballarat, there are so many new land estates, new infrastructure, shopping strips, sporting, cinemas, public transport and the list goes on.
Hope this helps with your journey
Taylor Morrison Homes
You need to double your budget if you want to live somewhere decent. For 600K you'd be limited to an impoverished outer suburb with terrible infrastructure and services.