I also agree that Bell direct is a good choice.
I would avoid CMC markets as they have at times shown poor order execution speed and reliability ( in my experience).
Another one to consider is Amscot. They are cheaper than Bell Direct re brokerage but the platform is more basic. If you only need to enter buy and sell orders and use conditional orders Amscot is fine and fast. My only gripe with Amscot is you can’t enter a market order without a price on the order into the ASX ( or at least I haven’t been able to figure it out) , which is sometimes desirable in a fast moving market.
All above are Chess sponsored brokers which is good