Need people to look over my build

[Restitution]

I'm buying a $2000 Gaming Rig for my dad. Or rather, he wants one and asked me to pick out the parts with a budget of $2000. I want to be careful to get it right and not make any mistakes. Here's what I've come up with:
PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Core i5-4670K 3.4GHz Quad-Core Processor ($229.99 @ NCIX US)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($29.94 @ OutletPC)
Motherboard: Gigabyte GA-Z87X-UD4H ATX LGA1150 Motherboard ($144.99 @ Newegg)
Memory: A-Data XPG V1.0 8GB (2 x 4GB) DDR3-1600 Memory ($64.99 @ NCIX US)
Storage: Samsung 840 EVO 250GB 2.5" Solid State Disk ($139.00 @ Amazon)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($56.98 @ OutletPC)
Video Card: EVGA GeForce GTX 780 3GB Dual FTW ACX Video Card ($509.99 @ Newegg)
Case: Fractal Design Define R4 w/Window (Black Pearl) ATX Mid Tower Case ($89.99 @ Newegg)
Power Supply: Rosewill Hive 750W 80+ Bronze Certified Semi-Modular ATX Power Supply ($79.99 @ Amazon)
Optical Drive: Asus DRW-24B1ST/BLK/B/AS DVD/CD Writer ($16.99 @ Newegg)
Operating System: Microsoft Windows 8.1 - 64-bit (OEM) (64-bit) ($99.98 @ OutletPC)
Monitor: Acer H236HLbid 60Hz 23.0" Monitor ($139.99 @ Newegg)
Monitor: Acer H236HLbid 60Hz 23.0" Monitor ($139.99 @ Newegg)
Keyboard: Corsair Vengeance K70 Wired Gaming Keyboard ($109.99 @ NCIX US)
Mouse: Razer DeathAdder 2013 Wired Optical Mouse ($57.11 @ NCIX US)
Headphones: Audio-Technica ATH-M50 Headphones ($126.21 @ Amazon)
Total: $2036.12
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-05-08 21:19 EDT-0400)

What do you think? Any issues you can find?

 

[Restitution]

bump

 

[Suztera]

Minor changes. I prefer Asus as they have a record with producing good quality motherboards but that is personally. The gigabyte you chosen is fine.
550W is sufficient.
A single monitor might be better than two separate.
PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Core i5-4670K 3.4GHz Quad-Core Processor ($229.99 @ NCIX US)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($29.94 @ OutletPC)
Motherboard: Asus Z87-A ATX LGA1150 Motherboard ($134.99 @ NCIX US)
Memory: A-Data XPG V1.0 8GB (2 x 4GB) DDR3-1600 Memory ($64.99 @ NCIX US)
Storage: Samsung 840 EVO 250GB 2.5" Solid State Disk ($139.00 @ Amazon)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($56.98 @ OutletPC)
Video Card: EVGA GeForce GTX 780 3GB Dual FTW ACX Video Card ($509.99 @ Newegg)
Case: Fractal Design Define R4 w/Window (Black Pearl) ATX Mid Tower Case ($119.99 @ NCIX US)
Power Supply: SeaSonic G 550W 80+ Gold Certified Semi-Modular ATX Power Supply ($79.99 @ Amazon)
Optical Drive: Asus DRW-24B1ST/BLK/B/AS DVD/CD Writer ($19.98 @ OutletPC)
Operating System: Microsoft Windows 8.1 - 64-bit (OEM) (64-bit) ($99.98 @ OutletPC)
Monitor: Acer H236HLbid 60Hz 23.0" Monitor ($160.48 @ Amazon)
Monitor: Acer H236HLbid 60Hz 23.0" Monitor ($160.48 @ Amazon)
Keyboard: Corsair Vengeance K70 Wired Gaming Keyboard ($109.98 @ Newegg)
Mouse: Razer DeathAdder 2013 Wired Optical Mouse ($57.32 @ NCIX US)
Headphones: Audio-Technica ATH-M50 Headphones ($126.21 @ Amazon)
Total: $2100.29
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-05-09 16:01 EDT-0400)