Hello everyone, i am at my final stages of building m:y new gaming rig. I have a few questions regarding my build, can u guys please shed some light on my build? hopefully i'm heading on the right track 
Approximate Purchase Date: Next Week
Budget Range:1800 just CPU (without monitor and other peripheral)
System Usage from Most to Least Important: Gaming (BF4) and Movies
Are you buying a monitor: Already own a QX2710
Parts to Upgrade: Everything
Do you need to buy OS: No
Preferred Website(s) for Parts: All US websites are ok.
Location: City, State/Region, Country - Chicago, Illinois, USA
Parts Preferences:Intel
Overclocking: Yes (not confident with current skills)
SLI or Crossfire: One GTX 780 (Future SLI with another 780)
Your Monitor Resolution: 2560 X 1440P
Additional Comments: I will game heavily on BF4, so this built has to run BF4 at high
And Most Importantly, Why Are You Upgrading: I have a very old CPU
I have a few question, since i am using a 1440p monitor, would a single 780 be sufficient to run BF4 at very high settings?
Do i need to add more fans? It seems that the Bitfenix case is pretty good with airflow.
Furthermore, im not sure if i should spend more money on mobos, should i look for an even cheaper mobo? Asus Maximus seems like an overkill, or am i missing something.
Many people have suggested getting an i7 as future game might need an I7 haswell?
CPU: Intel Core i5-4670K 3.4GHz Quad-Core Processor ($219.00 @ Amazon) http://pcpartpicker.com/part/intel-cpu-bx80646i54670k
OR
CPU: Intel Core i7-3770K 3.5GHz Quad-Core Processor ($319.99 @ Newegg) http://pcpartpicker.com/part/intel-cpu-bx80637i73770k
CPU Cooler: Corsair H110 94.0 CFM Liquid CPU Cooler ($109.99 @ Amazon) http://pcpartpicker.com/part/corsair-cpu-cooler-h110
OR
CPU Cooler: Noctua NH-D14 65.0 CFM CPU Cooler ($78.99 @ Newegg) http://pcpartpicker.com/part/noctua-cpu-cooler-nhd14
Motherboard: Asus Maximus VI Hero ATX LGA1150 Motherboard ($205.00 @ Amazon) http://pcpartpicker.com/part/asus-motherboard-maximusvihero
OR
Motherboard: ASRock Z87 Extreme6 ATX LGA1150 Motherboard ($174.99 @ Newegg) http://pcpartpicker.com/part/asrock-motherboard-z87extreme6
Storage: Samsung 840 Pro Series 128GB 2.5" Solid State Disk ($122.99 @ NCIX US) http://pcpartpicker.com/part/samsung-internal-hard-drive-mz7pd128bw
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($59.99 @ NCIX US) http://pcpartpicker.com/part/western-digital-internal-hard-drive-wd10ezex
Memory: G.Skill Sniper Gaming Series 16GB (2 x 8GB) DDR3-1600 Memory ($110.50 @ Newegg) http://pcpartpicker.com/part/gskill-memory-f31600c9d16gsr
Video Card: EVGA GeForce GTX 780 3GB Video Card ($659.99 @ Amazon) http://pcpartpicker.com/part/evga-video-card-03gp42784kr
Case: BitFenix Colossus Venom Window / Green LED / Black Steel / Plastic ATX Full Tower Computer Case (134.00 @ newegg) http://www.newegg.com/Product/Product.aspx?Item=N82E16811345008
Power Supply: Corsair Professional 750W 80 PLUS Gold Certified ATX12V / EPS12V Power Supply ($89.99 @ Newegg)
http://pcpartpicker.com/part/corsair-power-supply-cmpsu750hx
Optical Drive: Asus DRW-24B1ST/BLK/B/AS DVD/CD Writer ($18.49 @ Amazon)
http://pcpartpicker.com/part/asus-optical-drive-drw24b1stblkbas
Total: 1669 - 1830
Please do tell me which parts i need to change to get the best value for money. Thank you for your help !!!!

Approximate Purchase Date: Next Week
Budget Range:1800 just CPU (without monitor and other peripheral)
System Usage from Most to Least Important: Gaming (BF4) and Movies
Are you buying a monitor: Already own a QX2710
Parts to Upgrade: Everything
Do you need to buy OS: No
Preferred Website(s) for Parts: All US websites are ok.
Location: City, State/Region, Country - Chicago, Illinois, USA
Parts Preferences:Intel
Overclocking: Yes (not confident with current skills)
SLI or Crossfire: One GTX 780 (Future SLI with another 780)
Your Monitor Resolution: 2560 X 1440P
Additional Comments: I will game heavily on BF4, so this built has to run BF4 at high
And Most Importantly, Why Are You Upgrading: I have a very old CPU
I have a few question, since i am using a 1440p monitor, would a single 780 be sufficient to run BF4 at very high settings?
Do i need to add more fans? It seems that the Bitfenix case is pretty good with airflow.
Furthermore, im not sure if i should spend more money on mobos, should i look for an even cheaper mobo? Asus Maximus seems like an overkill, or am i missing something.
Many people have suggested getting an i7 as future game might need an I7 haswell?
CPU: Intel Core i5-4670K 3.4GHz Quad-Core Processor ($219.00 @ Amazon) http://pcpartpicker.com/part/intel-cpu-bx80646i54670k
OR
CPU: Intel Core i7-3770K 3.5GHz Quad-Core Processor ($319.99 @ Newegg) http://pcpartpicker.com/part/intel-cpu-bx80637i73770k
CPU Cooler: Corsair H110 94.0 CFM Liquid CPU Cooler ($109.99 @ Amazon) http://pcpartpicker.com/part/corsair-cpu-cooler-h110
OR
CPU Cooler: Noctua NH-D14 65.0 CFM CPU Cooler ($78.99 @ Newegg) http://pcpartpicker.com/part/noctua-cpu-cooler-nhd14
Motherboard: Asus Maximus VI Hero ATX LGA1150 Motherboard ($205.00 @ Amazon) http://pcpartpicker.com/part/asus-motherboard-maximusvihero
OR
Motherboard: ASRock Z87 Extreme6 ATX LGA1150 Motherboard ($174.99 @ Newegg) http://pcpartpicker.com/part/asrock-motherboard-z87extreme6
Storage: Samsung 840 Pro Series 128GB 2.5" Solid State Disk ($122.99 @ NCIX US) http://pcpartpicker.com/part/samsung-internal-hard-drive-mz7pd128bw
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($59.99 @ NCIX US) http://pcpartpicker.com/part/western-digital-internal-hard-drive-wd10ezex
Memory: G.Skill Sniper Gaming Series 16GB (2 x 8GB) DDR3-1600 Memory ($110.50 @ Newegg) http://pcpartpicker.com/part/gskill-memory-f31600c9d16gsr
Video Card: EVGA GeForce GTX 780 3GB Video Card ($659.99 @ Amazon) http://pcpartpicker.com/part/evga-video-card-03gp42784kr
Case: BitFenix Colossus Venom Window / Green LED / Black Steel / Plastic ATX Full Tower Computer Case (134.00 @ newegg) http://www.newegg.com/Product/Product.aspx?Item=N82E16811345008
Power Supply: Corsair Professional 750W 80 PLUS Gold Certified ATX12V / EPS12V Power Supply ($89.99 @ Newegg)
http://pcpartpicker.com/part/corsair-power-supply-cmpsu750hx
Optical Drive: Asus DRW-24B1ST/BLK/B/AS DVD/CD Writer ($18.49 @ Amazon)
http://pcpartpicker.com/part/asus-optical-drive-drw24b1stblkbas
Total: 1669 - 1830
Please do tell me which parts i need to change to get the best value for money. Thank you for your help !!!!