A few things. One, drop the 2600k in favor of the 2500k. It's $100 cheaper, and performs just as well in gaming (they are actually almost the same processor).
next, drop the PSU in favor of this one: http://www.msy.com.au/product.jsp?productId=4992
It's a corsair 80+, so it should be more reliable, and it will allow you to SLI.
Lastly, those prices seem kinda high. I'm not an expert for Australian sites, but you might wanna shop around.
Hope it helps!