Good gaming PC setup for ultra settings?

[Immence]

Hello guys!
I was wondering if you might give me some feedback on the setup I have here:
http://pcpartpicker.com/p/33x6i
In addition to this I also plan to have 3 extra computer case fans [3x140mm].

I would like to know if I should go with the i5 4670k instead of 4770k. I will not overclock the CPU.

Will the setup be good for overclocking the Graphics card? Will the temperature be low enough with all the fans?

Should I go with 1866 Mhz RAM instead of 1600Mhz? Is there a noticable difference in speed?

Thank you all for your time and feedback! Please also give detailed answers so I know the reason to your thoughts!

 

[mathieub]

Why go with a K version at all if youre not going to over clock the CPU, go with the i5 save some money since for gaming it will not make a difference.

You also will not notice a difference in the two RAM speeds.

As for the GPU you could probably do a bit of OC on it.

 

[HiTechObsessed]

For a gaming PC you went WAY overboard in a lot of places. This setup would do the same performance for $450 less:

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Core i5-4670 3.4GHz Quad-Core Processor ($209.98 @ OutletPC)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($29.98 @ OutletPC)
Motherboard: MSI B85-G41 PC Mate ATX LGA1150 Motherboard ($79.49 @ Amazon)
Memory: A-Data XPG V2 8GB (2 x 4GB) DDR3-1600 Memory ($69.99 @ Amazon)
Storage: Kingston SSDNow V300 Series 120GB 2.5" Solid State Disk ($65.99 @ Amazon)
Storage: Western Digital Caviar Black 1TB 3.5" 7200RPM Internal Hard Drive ($88.98 @ SuperBiiz)
Video Card: EVGA GeForce GTX 780 3GB Video Card ($489.99 @ NCIX US)
Case: Fractal Design Define R4 (Black Pearl) ATX Mid Tower Case ($79.99 @ Newegg)
Power Supply: XFX 650W 80+ Bronze Certified ATX Power Supply ($59.99 @ NCIX US)
Operating System: Microsoft Windows 8.1 (OEM) (64-bit) ($89.98 @ OutletPC)
Total: $1264.36
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-03-03 16:56 EST-0500)

If you're not overclocking you don't need a Z87 board. ANd 1600 is the way to go, there's no perceptible difference in performance. You also wouldn't need the additional fans with a single GPU and not overclocking the CPU.