don't buy a premade computer, build it yourself...
go to umart.com.au
or use staticice.com.au it lists any computer part and its prcies at almost every online store in aus.
a good price guide is also pccasegear they are always well priced and reliable.
from umart:
AMD Phenom II X4 840 QuadCore 3.2GHz L2 Cache Socket AM3 95W $125
MSI 740GM-P25 UATX 740G AM3 DDR3 $56
CoolerMaster Centurion 5 II Black Tower Case W 500W PSU $99
Corsair Vengeance CMZ8GX3M2A1600C9 8GB (2x4GB) DDR3 $55
Sapphire HD6770 1G GDRR5 PCIE HDMI $108
Any HDD u want, they are expensive now though due too floods in Thailand...
Posted on Tuesday, 3rd January 2012