Here is my take. It's $4 over because I didn't want to change your case.
PCPartPicker part list:
http://pcpartpicker.com/p/3IK7w
Price breakdown by merchant: http://pcpartpicker.com/p/3IK7w/by_merchant/
Benchmarks: http://pcpartpicker.com/p/3IK7w/benchmarks/
CPU: Intel Xeon E3-1230 V3 3.3GHz Quad-Core Processor ($244.98 @ SuperBiiz)
Motherboard: ASRock B85 Pro4 ATX LGA1150 Motherboard ($69.99 @ Newegg)
Memory: A-Data XPG V1.0 8GB (2 x 4GB) DDR3-1600 Memory ($64.99 @ NCIX US)
Storage: Crucial M500 120GB 2.5" Solid State Disk ($66.99 @ Amazon)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($54.43 @ OutletPC)
Video Card: Sapphire Radeon R9 280X 3GB Dual-X Video Card ($289.99 @ Amazon)
Case: Corsair Graphite Series 230T Orange ATX Mid Tower Case ($74.99 @ NCIX US)
Power Supply: XFX 550W 80+ Bronze Certified ATX Power Supply ($47.99 @ NCIX US)
Operating System: Microsoft Windows 8.1 (OEM) (64-bit) ($89.98 @ OutletPC)
Total: $1004.33
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-05-12 17:37 EDT-0400)