Well the most popular Memory of them being Corsair, OCZ and Kingston.
Personally i would go for Corsair as i believe you will be using them on an AMD Phenom II 720 right?
You might wanna consider the Corsair Black Edition Memory for AMD Black Edition edition CPUs that provides overclock memory profiles like XMP on i7 CPU enable memory.
If price does not permit check out the ordinary Corsair DDR3 memory DDR3-1600mhz or Kingston HyperX series or OCZ Platinum
You might wanna check http://staticice.com.au/
for the AUS market pricing