This will get you what you want. I couldn't find that Cougar case on partpicker though. And what about a hard drive?
PCPartPicker part list:
http://au.pcpartpicker.com/p/34XYg
Price breakdown by merchant: http://au.pcpartpicker.com/p/34XYg/by_merchant/
Benchmarks: http://au.pcpartpicker.com/p/34XYg/benchmarks/
CPU: Intel Core i5-4570 3.2GHz Quad-Core Processor ($229.00 @ CPL Online)
Motherboard: ASRock B85M-HDS Micro ATX LGA1150 Motherboard ($79.00 @ Mwave Australia)
Memory: G.Skill Ares Series 8GB (2 x 4GB) DDR3-1600 Memory ($105.00 @ Mwave Australia)
Video Card: XFX Radeon R9 280X 3GB Video Card ($369.00 @ PCCaseGear)
Power Supply: Antec High Current Gamer 520W 80+ Bronze Certified ATX Power Supply ($97.00 @ CPL Online)
Total: $879.00
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-03-06 16:25 EST+1100)