Since you aren't planning on overclocking and this build is primarily for gaming I see a few things you can change that will have very little impact on the performance but will save you $$$.
-CPU can be lowered to an i5. There is very little difference in gaming between an i5 and an i7. Also, since you don't want to overclock you don't need the K version. However, if you want the ability to overclock in the future then the K version is what you want...don't worry. It'll only add about $10 to the build.
-Motherboard can be changed to a cheaper one. To me, the only reason to go for a super expensive mobo is if it has features that a cheaper one doesn't have. The one I've linked has everything I would need, and should fit the current build nicely. However, I didn't know what features you'd want from a mobo so this may not work out for you.
-RAM can be lowered to 8GB. No games take advantage of 16GB now, and it is a relatively cheap upgrade for later on.
Besides those changes, there isn't a whole lot of room to change the components while still maintaining the quality of your system. You could probably save ~$30-40 bucks by going for different brands on different components, but nothing major.
You do realize that you don't have storage on your list right? I'm assuming it's because you already have it?
The only other thing I could think of to lower the cost further would be to go with a 770. Which would make the system less of a powerhouse but still be quite capable. For reference, with my system I play every game I've tried on ultra. I've added that to the bottom too (the 4GB version because why not, you can save another ~$40 to go with the 2GB version)
Revised Build:
PCPartPicker part list /
Price breakdown by merchant /
Benchmarks
CPU: Intel Core i5-4670 3.4GHz Quad-Core Processor ($214.99 @ SuperBiiz)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($29.98 @ OutletPC)
Thermal Compound: Arctic Silver 5 High-Density Polysynthetic Silver 3.5g Thermal Paste ($6.73 @ OutletPC)
Motherboard: MSI Z87-G41 PC Mate ATX LGA1150 Motherboard ($89.99 @ Newegg)
Memory: Crucial Ballistix Sport 8GB (1 x 8GB) DDR3-1600 Memory ($66.95 @ Amazon)
Video Card: Zotac GeForce GTX 780 3GB Video Card ($518.99 @ SuperBiiz)
Case: Rosewill THOR V2 ATX Full Tower Case ($128.53 @ Amazon)
Power Supply: Corsair CX 500W 80+ Bronze Certified Semi-Modular ATX Power Supply ($49.99 @ Microcenter)
Optical Drive: Asus BW-12B1ST/BLK/G/AS Blu-Ray/DVD/CD Writer ($58.98 @ OutletPC)
Operating System: Microsoft Windows 7 Professional SP1 (OEM) (64-bit) ($132.98 @ OutletPC)
Total: $1298.11
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-12-28 06:19 EST-0500)
GTX 770 version:
PCPartPicker part list /
Price breakdown by merchant /
Benchmarks
CPU: Intel Core i5-4670 3.4GHz Quad-Core Processor ($214.99 @ Amazon)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($29.98 @ OutletPC)
Thermal Compound: Arctic Silver 5 High-Density Polysynthetic Silver 3.5g Thermal Paste ($6.73 @ OutletPC)
Motherboard: MSI Z87-G41 PC Mate ATX LGA1150 Motherboard ($89.99 @ Newegg)
Memory: Crucial Ballistix Sport 8GB (1 x 8GB) DDR3-1600 Memory ($66.95 @ Amazon)
Video Card: PNY GeForce GTX 770 4GB Video Card ($369.99 @ Newegg)
Case: Rosewill THOR V2 ATX Full Tower Case ($128.53 @ Amazon)
Power Supply: Corsair CX 500W 80+ Bronze Certified Semi-Modular ATX Power Supply ($49.99 @ Microcenter)
Optical Drive: Asus BW-12B1ST/BLK/G/AS Blu-Ray/DVD/CD Writer ($58.98 @ OutletPC)
Operating System: Microsoft Windows 7 Professional SP1 (OEM) (64-bit) ($132.98 @ OutletPC)
Total: $1149.11
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-12-28 06:20 EST-0500)