G'day Mate,
I have done a lot of flying at both Curtis Aviation in Camden and at NSW Air in Wollongong and IMHO they are both good. Have you done any flight training yet? Why not go in to a few flying schools and talk to them, see what you think and then make a decision based on your own opinion.
In my opinion the good points of the two are:
Curtis - Tailwheel, dirt strip and aerobatic training is excellent. Good admin staff and instructors. Newer aircraft (mostly) and a good sim.
NSW Air - Quiet training area and circut, very good twin training aircraft and a good sim. Friendly instructors and a very, very experienced CFI. Also the potential to get free hours on completion of CPL (beach patrols).
I enjoyed flying with both, but for different reasons. Each school had their strengths and weaknesses.