Australia is a big country. If you go to Melbourne, you could audition Greg Osborn's stuff, if you contact him as noted. You could also audition Aspen Amplifiers, if you contact Hugh. See his circle on Audiocircle for further info. If you want to just go to a shop, try Audiophile in North Fitzroy, as they make their own stuff. Most Aussie audio shops just have imported gear.