If it were me (after finding about your recent move to Australia part) , I'd start an Australian biotope tank.
There are so many unique and interesting species there.
Its kind of what I've done here in Panama.
I moved from the US to Panama, and have a biotope tank based on the species of a certain stretch of river in the eastern part of the country, those that I collect myself.
It's a challenge, but one I find rewarding, much more rewarding than just buying something at a LFS.
Besides that........
Here, all the LFSs have either African cichlid species, or a few types of S Americans like Oscars, because that's what the local population seems to want.
Of course there is a large Asian population that keep Arawanas, but my 180 gal is too small for that, and the water parameters in the part of the country where I live, don't really match what they need.