Put together a similar build within that price range with what I would go with:
Note: Left off the secondary HD (since it showed purchased for $0.00, so I assume you already have this) and didn't add in any extra fans.
PCPartPicker part list:
http://pcpartpicker.com/p/6CBrzy
Price breakdown by merchant:
http://pcpartpicker.com/p/6CBrzy/by_merchant/
CPU: Intel Core i5-6400 2.7GHz Quad-Core Processor ($179.99 @ B&H)
Motherboard: Asus H110M-A Micro ATX LGA1151 Motherboard ($58.99 @ SuperBiiz)
Memory: G.Skill Ripjaws V Series 8GB (2 x 4GB) DDR4-2400 Memory ($39.99 @ Newegg)
Storage: Samsung 120GB 2.5" Solid State Drive ($61.99 @ Amazon)
Video Card: EVGA GeForce GTX 960 4GB Superclocked Video Card ($185.30 @ Newegg)
Case: Cooler Master N200 MicroATX Mid Tower Case ($39.99 @ Newegg)
Power Supply: EVGA SuperNOVA G2 550W 80+ Gold Certified Fully-Modular ATX Power Supply ($59.99 @ Newegg)
Total: $626.24
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-02-28 23:31 EST-0500