I didn't worry about an OS or an optical drive. Most people have a spare OS around and optical drives are real easy to find if you need one.
PCPartPicker part list:
http://pcpartpicker.com/p/2Ppbe
Price breakdown by merchant: http://pcpartpicker.com/p/2Ppbe/by_merchant/
Benchmarks: http://pcpartpicker.com/p/2Ppbe/benchmarks/
CPU: Intel Core i5-4670 3.4GHz Quad-Core Processor ($218.98 @ Best Buy)
Motherboard: Gigabyte G1.Sniper B5 ATX LGA1150 Motherboard ($99.79 @ Newegg)
Memory: Corsair Vengeance 8GB (2 x 4GB) DDR3-1600 Memory ($86.99 @ Newegg)
Storage: Samsung 840 EVO 120GB 2.5" Solid State Disk ($89.99 @ Amazon)
Storage: Western Digital Caviar Black 1TB 3.5" 7200RPM Internal Hard Drive ($84.98 @ Amazon)
Video Card: Asus GeForce GTX 770 2GB Video Card ($319.99 @ NCIX US)
Case: NZXT Source 220 ATX Mid Tower Case ($44.99 @ TigerDirect)
Power Supply: Corsair Builder 600W 80+ Bronze Certified ATX Power Supply ($69.99 @ Newegg)
Total: $1000.70
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-02-08 06:18 EST-0500)