I didn't know there was a thread on Lowyat for Australian properties, I have never marketed overseas project openly because until now, i think it's targeted to those who want and inquire about it.
My 2 cents,
After browsing through the sifu's posts here is that in my opinion, for Melbourne only, it's that if you're migrating there, look for House and Land, unless you're very new to Melbourne, rent in the city and if it suits your lifestyle, then only decide, but majority will not like the hustle and bustle of city life(same with KL). As i do take trips to Melbourne to visit friends and family, It's busy during working hours, but mostly dead during the weekend.
Apartments in the CBD really depends on the area, I have friends who bought directly in CBD because they work there. and even they say that apartments in the CBD exclusively is over-supplied and priced, unless for their children who studies there, they don't mind paying more for the convenience that its nearer to their University/Colleges.
One of the sifu's mentioned here that buy where the local buys, i agree partly because for their culture, they don't like noisy/crowded and want their own privacy and garages and space etc. while in majority of the South-eastern part like Dandenong/Clayton/Richmond are like the matured asian suburbs already. Abit further down to Cranbourne is where the locals stay.
I've learnt from clients and friends that if you do get the wrong agent, it can be a nightmare, especially a couple of years ago when UK and Australia was hot investments venue, the complaint outweigh the good because everyone wants to earn a quick buck and forget about the service.
Lastly, yes, alot of China buyers, especially the newer developments in West/CBD Melbourne. hence imposed of so many restrictions and the banks closing their doors to foreigners. and Usually i would say you don't compare properties in Sydney because it's a world city like New York, Tokyo, London etc.
I like Aus because with a little research, more of their information there are transparent, quite easily accessible if you know what to look for, whether for investment or own stay, and as one sifu here mention, fly there and see the area before you commit in any property that's not within a drive away. No harm to spend the extra bucks to be sure, Aus has always been a long term investment place.
Good luck to all who wants to try their hand, usually will benefit with the right steps taken to be sure with the failing currency.

I'll be heading back to Melbourne coming March to follow up and explore Southbank/Fisherman's bend as the last time only managed to visit Crown Casino.