Cant get much better for 800 bucks

i pick some cheaper parts (not necessarily worse)
and choose Radeon 270X
plus 212 evo for OC

still cheaper

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: AMD FX-6300 3.5GHz 6-Core Processor ($109.99 @ Amazon)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($29.99 @ NCIX US)
Motherboard: Asus M5A97 R2.0 ATX AM3+ Motherboard ($89.99 @ Micro Center)
Memory: Kingston Blu 8GB (2 x 4GB) DDR3-1600 Memory ($64.99 @ Newegg)
Storage: Hitachi Ultrastar 1TB 3.5" 7200RPM Internal Hard Drive ($48.00 @ Amazon)
Video Card: Sapphire Radeon R9 270X 2GB Video Card ($215.38 @ Newegg)
Case: NZXT Source 210 Elite (White) ATX Mid Tower Case ($39.99 @ Newegg)
Power Supply: Corsair Builder 600W 80+ Bronze Certified ATX Power Supply ($49.99 @ Newegg)
Optical Drive: Asus DRW-24B1ST/BLK/B/AS DVD/CD Writer ($19.98 @ OutletPC)
Operating System: Microsoft Windows 8.1 (OEM) (64-bit) ($89.99 @ NCIX US)
Total: $758.29
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-03-20 23:42 EDT-0400)
 
PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: AMD FX-6300 3.5GHz 6-Core Processor ($109.99 @ Amazon)
Motherboard: Asus M5A97 R2.0 ATX AM3+ Motherboard ($89.99 @ Micro Center)
Memory: A-Data XPG V1.0 8GB (2 x 4GB) DDR3-1600 Memory ($61.99 @ Newegg)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($57.98 @ OutletPC)
Video Card: PNY GeForce GTX 760 2GB Video Card ($236.99 @ Amazon)
Case: NZXT Source 220 ATX Mid Tower Case ($44.99 @ TigerDirect)
Power Supply: XFX 550W 80+ Bronze Certified ATX Power Supply ($59.99 @ Newegg)
Optical Drive: LG GH24NS95 DVD/CD Writer ($21.98 @ OutletPC)
Operating System: Microsoft Windows 8.1 (OEM) (64-bit) ($89.99 @ NCIX US)
Total: $773.89
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-03-21 00:03 EDT-0400)

This is better than OPs build.
It has:
Better GPU
Better quality PSU
Costs $4 less.
 


Huge waste of money. A Coolermaster Hyper 212 EVO will cool significantly better for WAY less money and make less than half the noise of an h55.

Also, that 1866 RAM is not going to be any faster than 1600mhz RAM. You selected CAS10. 1600mhz CAS9 RAM may even be faster. The CAS rating is even more important than the speed.