The A8 would be great, but here is one with an i5
PCPartPicker part list:
http://pcpartpicker.com/p/tY9ZvK
Price breakdown by merchant: http://pcpartpicker.com/p/tY9ZvK/by_merchant/
CPU: Intel Core i5-4570S 2.9GHz Quad-Core Processor ($186.95 @ SuperBiiz)
Motherboard: ASRock H97M Anniversary Micro ATX LGA1150 Motherboard ($68.98 @ OutletPC)
Memory: G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-1600 Memory ($62.99 @ NCIX US)
Storage: Crucial MX100 128GB 2.5" Solid State Drive ($62.99 @ Amazon)
Case: Fractal Design Core 1100 MicroATX Mini Tower Case ($36.25 @ Directron)
Power Supply: SeaSonic 350W 80+ Bronze Certified ATX Power Supply ($38.99 @ SuperBiiz)
Optical Drive: Asus DRW-24F1ST DVD/CD Writer ($14.98 @ OutletPC)
Operating System: Microsoft Windows 8.1 - 64-bit (OEM) (64-bit) ($89.98 @ OutletPC)
Total: $562.11
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-02-15 23:53 EST-0500