http://pcpartpicker.com/p/2HhXJx
PCPartPicker part list:
http://pcpartpicker.com/p/2HhXJx
Price breakdown by merchant: http://pcpartpicker.com/p/2HhXJx/by_merchant/
CPU: Intel Core i5-4690 3.5GHz Quad-Core Processor ($214.99 @ NCIX US)
Motherboard: ASRock Z97 EXTREME4 ATX LGA1150 Motherboard ($115.99 @ Newegg)
Memory: Crucial Ballistix 8GB (2 x 4GB) DDR3-1866 Memory ($84.99 @ Adorama)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($50.40 @ Amazon)
Video Card: EVGA GeForce GTX 750 Ti 2GB FTW ACX Video Card ($139.99 @ Newegg)
Case: Cooler Master Elite 431 Plus (Black) ATX Mid Tower Case ($39.99 @ Newegg)
Power Supply: EVGA SuperNOVA NEX 650W 80+ Gold Certified Fully-Modular ATX Power Supply ($59.99 @ Newegg)
Total: $706.34
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2014-07-25 14:49 EDT-0400
And you can "Fiddle" with this, Always upgrade the graphics card later or drop some components for more cost effective ones. But this will run pretty much everything.
Or upgrade to the K-version of that CPU for overclocking since those Z boards are nice for Overclocking. You would also need a copy of windows and a DVD rom.