This is the best you can get for around $700.
PCPartPicker part list: http://pcpartpicker.com/p/2R8M23
Price breakdown by merchant: http://pcpartpicker.com/p/2R8M23/by_merchant/
CPU: Intel Core i5-4570 3.2GHz Quad-Core Processor ($189.29 @ Amazon)
Motherboard: ASRock H81M-DGS R2.0 Micro ATX LGA1150 Motherboard ($47.98 @ Newegg)
Memory: Team Dark Series 8GB (2 x 4GB) DDR3-1600 Memory ($57.99 @ Newegg)
Storage: Western Digital RE3 1TB 3.5" 7200RPM Internal Hard Drive ($48.00 @ Amazon)
Video Card: Gigabyte Radeon R9 290 4GB WINDFORCE Video Card ($254.99 @ NCIX US)
Case: NZXT Source 210 (Black) ATX Mid Tower Case ($32.99 @ Micro Center)
Power Supply: EVGA 500W 80+ Bronze Certified ATX Power Supply ($39.99 @ NCIX US)
Optical Drive: Samsung SH-224DB/BEBE DVD/CD Writer ($13.99 @ Amazon)
Total: $685.22
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2014-12-19 17:25 EST-0500