Brian, perhaps your question is too general... and many of us don't know the boating
market in Oz...
How do you envision using the boat
? Sleeping aboard? Or not? Guests? Or not? Cooking
aboard? Or not? Flying bridge? Or not? Et cetera. You could hum a few bars about all that, and it might help people suggest useful boats...
Another idea is to throw out names of a bunch of boats that appeal to you, and why. That'd maybe give folks a target (or several) for discussion, too.