At $365 AUD shipped you will be hard pressed to find a better value performance card. Keep in mind these are not reference cards and are capable of 30-40% overclocks in some cases. At those speeds they can outperform gtx 680's at a fraction of the cost.
Review summary here
http://www.eteknix.com/reviews/graphics/msi-radeon-hd-7950-t…
Product Features and Technical Details
Product Features
AMD Radeon HD7950
3GB 384-bit GDDR5
Mini DisplayPortx2, DVI-I, HDMI
PCI Express 3.0
CrossFire Ready
Overclocked Edition
Graphics and Display
Graphics RAM: 3
Cases and Expandability
Size (LWH): 13.58 inches, 10.43 inches, 3.15 inches
Weight: 3.3 pounds
Just tried it then and it allows you to ship to Aus. Nice find :)