Which part of Aus are you living in? (QLD, NSW, etc) Prices of components seem to fluctuate between states imo. For that budget I would get... -i5 2400 (not the 'S' version.) -Either a HD6870, HD6850 or HD6790 depending on budget. -The cheapest lga1155 h67 motherboard you can find. (asrock, gigabyte, ecs, etc are cheap and well known brands.) -6gb of NON ECC DDR3 1333 or 1600 ram depending on budget. -Reuse case, psu, hard drive, dvd drive, etc from current computer. To make it even cheaper, try to get the components from online retailers you trust, and remember to take the cost of shipping into account as well.