xtanda--- does Interactive Brokers (usually referred to here as IB) operate in Australia? If so, you should check it out. I live in Canada, and have service from TOS which charges a decent level of commission and give first class service, but they don't operate in Australia, (I don't think).
I have IB account (well, the account is with other local company but the statement account is from IB - so practically I am using IB isn't it ?) - but the charge for option in US is $15 per leg. Not as cheap as IB direct (less than $1). The problem with direct account is the hassle of overseas transaction, especially with this new anti money laundrying law, the transfer fee, fx, etc,etc that eat up all the saving and time. But thanks for your suggestion! I'll check it from time to time.