Hi Dave.
As far as NSW goes. I don't really know. I don't waste my time with it. I would be wary of collecting it from anywhere in Lyttleton harbour, or around the estuary obviously. Which doesn't leave a lot of places with convenient access. I may be wrong, and you could test the water, but it's more the things you can't test for that I'd be worried about.
Do you mind if I ask what shops you have been talking to? Some are better than others.
180 litre tank? Is that 3 foot? I really would not recommend starting with anything under 4 foot. I makes life much harder for yourself.
I have plenty of frags in my tank for when the time comes to add stuff to your tank.
I am very busy for the next month and a half, but after that I would be more than happy to show you my setup so you can get some idea of what does what, and what not to do.
There is also another reefer down here, JoeBlog (Steve), who posts here every now and then.
Layton