There is still a lot you can change:
-Again, socket LGA 1155 is a dead socket. Go with socket LGA 1150, you won't regret it and it's practically the same price.
-2x8gb of ram is overkill. 2x4gb is plenty.
-OCZ power supplies are not that great.
PCPartPicker part list /
Price breakdown by merchant /
Benchmarks
CPU: Intel Core i5-4670K 3.4GHz Quad-Core Processor ($240.50 @ Vuugo)
CPU Cooler: Phanteks PH-TC14PE_BK 78.1 CFM CPU Cooler ($86.98 @ Amazon Canada)
Motherboard: Gigabyte GA-Z87X-UD3H ATX LGA1150 Motherboard ($124.99 @ NCIX)
Memory: G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-1600 Memory ($77.84 @ DirectCanada)
Storage: Samsung 840 EVO 120GB 2.5" Solid State Disk ($105.98 @ Newegg Canada)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($62.44 @ DirectCanada)
Video Card: Gigabyte Radeon R9 290 4GB Video Card ($532.84 @ Newegg Canada)
Wireless Network Adapter: TP-Link TL-WDN4800 802.11a/b/g/n PCI-Express x1 Wi-Fi Adapter ($41.59 @ DirectCanada)
Case: NZXT Phantom (White) ATX Full Tower Case ($139.98 @ Newegg Canada)
Power Supply: XFX ProSeries 850W 80+ Gold Certified Fully-Modular ATX Power Supply ($135.81 @ DirectCanada)
Optical Drive: Asus DRW-24B1ST/BLK/B/AS DVD/CD Writer ($17.50 @ Vuugo)
Operating System: Microsoft Windows 8.1 - OEM (64-bit) ($99.99 @ NCIX)
Total: $1666.44
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-12-10 19:09 EST-0500)
For $100 cheaper:
-Newer socket.
-Changed cpu cooler. The Phanteks performs a bit worse than the H100i, but it's much cheaper and quieter. It's definitely the better buy, IMHO.
-8gb of ram is plenty.
-Changed to a faster and more reliable SSD. Also changed to a cheaper HDD because there's no need for a Black as a secondary drive.
-Better quality psu, also larger for more headroom when you crossfire, if ever, in the future.
I would wait until the aftermarket coolers on the R9-290 come out, it shouldn't be much longer.