I'd for something like this:
PCPartPicker part list /
Price breakdown by merchant
CPU: Intel Core i5-4440 3.1GHz Quad-Core Processor ($164.99 @ SuperBiiz)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($28.99 @ Micro Center)
Motherboard: Asus H97-PLUS ATX LGA1150 Motherboard ($89.34 @ SuperBiiz)
Memory: G.Skill Sniper Series 8GB (2 x 4GB) DDR3-1866 Memory ($81.98 @ OutletPC)
Storage: Crucial MX100 128GB 2.5" Solid State Drive ($62.14 @ SuperBiiz)
Storage: Seagate SV35.5 2TB 3.5" 7200RPM Internal Hard Drive ($84.99 @ Amazon)
Video Card: XFX Radeon R9 280X 3GB Double Dissipation Video Card ($199.99 @ Newegg)
Case: Cooler Master HAF 912 ATX Mid Tower Case ($39.99 @ Newegg)
Power Supply: Antec High Current Gamer 620W 80+ Bronze Certified Semi-Modular ATX Power Supply ($39.99 @ Newegg)
Operating System: Microsoft Windows 8.1 - 64-bit (OEM) (64-bit) ($90.26 @ OutletPC)
Total: $882.66
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2014-12-01 12:56 EST-0500
The A10 you had is only worth the money if you aren't going to use a discrete graphics card.
I upgraded the CPU, GPU, motherboard and added a PSU (do you need one?). I also dropped the RAM to 8GB, you don't need 16GB unless you will be doing editing, rendering ect.