Auzzee, and any other OZ reader
Have a look at the Australian Hydrographic( sp?) Office CD charts. Its the one I would buy if and when I go again ( the one I have now is a USA CD ),but I think the OZ one .. and for the life of me I cannot remember its name at the moment , is better. Plus you can update ( for an extra fee) annually, plus you can buy the sections of the world you wish to cruise in.. ie if you just want OZ/NZ then thats all you pay for, as you venture deaper afield , you get the charts updated for that area.
They have a sample disk , avalable from Boat Books free,get one and have a look and a play with it.