New Build - Unsure of a few things and would appreciate help

Thanks for taking the time to read and hopefully help me out


Approximate Purchase Date: Within a month max, but sooner the better.


Budget Range: $1400.00AUD but flexible if its worth it.


System Usage from Most to Least Important: Gaming (anything and everything, BF3 to give you an idea), productivity, internet.


Parts Not Required: Speakers. I have a 1440x900 screen but i plan using it as a secondary screen in a dual screen set up.

Preferred Website(s) for Parts: http://www.msy.com.au/default.jsp?category=21&page=2 (http://msy.com.au/) or www.umart.com.au/ MSY is better priced in my experience


Country of Origin: Australia


Parts Preferences: Not fussed


Overclocking: maybe


SLI or Crossfire: Possibly in the future but i generally prefer a single powerful card than 2 average cards


Monitor Resolution: as per above i have a 1440x900 and based on my research thus far 1920x1080 seems to be the likely candidate for my primary screen


Additional Comments: see below:

Ive done some research and have come up with a preliminary build (or part of), ignore the fact that some of the stuff is out of stock on the website.

Seagate 3.5" Barracuda 1TB ST31000524AS SATA3 7200RPM 32MB HDD
http://www.msy.com.au/product.jsp?productId=7386

Intel Core i5-2500K 3.3Ghz 1155pin Boxed CPU
http://www.msy.com.au/product.jsp?productId=7581

Antec 300 Three-Hundard Gaming Tower without PSU
http://www.msy.com.au/product.jsp?productId=878

Microsoft MS Windows 7 Home Premium 64bit OEM
http://www.msy.com.au/product.jsp?productId=5821

G.Skill Ripjaws X F3-10666CL9D-8GBXL 8G Kit(4Gx2) DDR3 1333
http://www.msy.com.au/product.jsp?productId=7261

2GB Powercolor 6970 PCI-E VGA Card
http://www.msy.com.au/product.jsp?productId=7168

Samsung SATA 22x Black DVD RW - 1 Year Warranty
http://www.msy.com.au/product.jsp?productId=5580

Gigabyte Wireless Desktop GK-KM7600 Multimedia (K/B+Mouse)
http://www.msy.com.au/product.jsp?productId=8243

As is obvious im still unsure as to what PSU, MOBO and Monitor (something around 23-24inch and $170.00) to for and im on the fence about the GPU as well.

So please review, criticize, and let me know what you think.

EDIT: I plan to only game on the primary screen and not "stretch" it across both