I personally use IBFX AU, and they've been quite reliable thus far. I would recommend them, but I'm not sure if your trading methods are similar to mine. What I can say is that execution is reliable (haven't had any requotes), customer service is pretty good, but some matter would require them to email you a reolution ('Liveperson' System). Withdrawal and deposits have happened in a timely manner. They are pretty stict with the sign-up process, but I guess that a one off.
P/s : Thought I'd mention I'm a Money Manager there, and also an IB, but I'm not suggesting you should sign up through me. You can do so directly from their website.