where to buy next

I have IPs in Darwin, canberra, south australia, nsw ( queanbeyan, jerrabomberra) and ready for my next purchase . don't really know where to buy now. any of your thoughts would be much appreciated.
Next buy

In my opinion, Sydney is booming now. Price of house is going up and up this time now. Melbourne was doing continously till now, adelaide started to slow down, perth was bottomed for a while, brisbane also slowed for the last two year. As price in sydney has already moed up, I think we can get bargain in either adelaide, brisbane or perth and where possibly next raise will come. Also there is a lot of resource talk going on