Intel C2Q - 6600
I don't know of any Australian stores so I posted the link to the official site, the Q6600 is a great X4 processor and is still going relatively strong today, it also overclocks very well.
Edit: I've just looked at the CPU support list for that motherboard and noticed that the highest
CPU on the list is the Core 2 Extreme X6800, and second to that is E6700. I'm not really convinced now that the Q6600 will work.http://www.amd.com/us/products/desktop/graphics/ati-radeon-hd-4000/hd-4770/Pages/hd-4770.aspx
AMD Radeon HD4770 512MB
This is a graphics upgrade that won't consume much power, and has HDMI-Out.
It's ATi's counterpart to the GeForce 9800GT