Need improvements for this build (~$700)

[Catastrophe666]

Hey what do you guys think of this build: http://pcpartpicker.com/user/OdinC14/saved/DwxV3C

Any parts that can be swapped out for better/cheaper ones? Also would a 550W power supply work fine instead of the 850W one? I was thinking of using this: http://pcpartpicker.com/part/xfx-power-supply-p1550sxxb9

 

[badboyrog2]

40$ more..but a lot better and solid build
i put an overkill psu ..but is on sale right now
PCPartPicker part list: http://pcpartpicker.com/p/BChYwP
Price breakdown by merchant: http://pcpartpicker.com/p/BChYwP/by_merchant/

CPU: Intel Core i5-4690K 3.5GHz Quad-Core Processor ($209.99 @ Amazon)
Motherboard: Gigabyte GA-Z97X-SLI ATX LGA1150 Motherboard ($108.00 @ Newegg)
Memory: AMD Radeon R9 Gamer Series 8GB (2 x 4GB) DDR3-2133 Memory ($79.99 @ Newegg)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($49.49 @ OutletPC)
Video Card: PowerColor Radeon R9 280 3GB TurboDuo Video Card ($159.99 @ Newegg)
Case: Corsair 300R ATX Mid Tower Case ($59.99 @ Micro Center)
Power Supply: Antec HCG M 850W 80+ Bronze Certified Semi-Modular ATX Power Supply ($59.99 @ NCIX US)
Optical Drive: Asus DRW-24B1ST/BLK/B/AS DVD/CD Writer ($18.88 @ OutletPC)
Total: $746.32
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2014-12-01 20:35 EST-0500