4cloud :
http://au.pcpartpicker.com/p/3nvQG
I noticed that you created another thread exactly the same so I answered both with the same PC.
It's total: 2070 $
If it's still too much go for a gtx 780 rather than a GTX 780 ti
Some constructive criticism on the above build:
You did not include:
a) an SSD,
b) a DVD burner, or
c) Windows
The SSD isn't essential, but I wouldn't personally build an expensive PC without one. Also, by having two drives (SSD and hard drive) you can make a backup Image of the Windows drive (SSD) to Restore in case of problems. I've done so twice (bad SSD, then key-logging malware).
*I use Acronis True Image to make backup Images. You can get a free (no automatic backups) version if you get a WD or Seagate drive. Seagate names it DiscWizard or something like that (WD from WD site; and Seagate from Seagate site).