please comments on these three computers.

PCPartPicker part list: http://pcpartpicker.com/p/2ul5Y
Price breakdown by merchant: http://pcpartpicker.com/p/2ul5Y/by_merchant/
Benchmarks: http://pcpartpicker.com/p/2ul5Y/benchmarks/

CPU: Intel Core i7-4770K 3.5GHz Quad-Core Processor ($299.99 @ NCIX US)
CPU Cooler: Corsair H100i 77.0 CFM Liquid CPU Cooler ($99.99 @ Newegg)
Motherboard: Asus SABERTOOTH Z87 ATX LGA1150 Motherboard ($229.99 @ Newegg)
Memory: Corsair Vengeance Pro 16GB (2 x 8GB) DDR3-1866 Memory ($180.54 @ NCIX US)
Storage: Samsung 840 Pro Series 256GB 2.5" Solid State Disk ($213.98 @ SuperBiiz)
Video Card: EVGA GeForce GTX 780 Ti 3GB Video Card ($719.99 @ Microcenter)
Case: Corsair Vengeance C70 (White) ATX Mid Tower Case ($119.99 @ Amazon)
Power Supply: SeaSonic Platinum 860W 80+ Platinum Certified Fully-Modular ATX Power Supply ($183.98 @ SuperBiiz)
Optical Drive: LG UH12NS29 Blu-Ray Reader, DVD/CD Writer ($54.98 @ SuperBiiz)
Operating System: Microsoft Windows 7 Professional SP1 (OEM) (64-bit) ($132.99 @ B&H)
Monitor: Asus VG248QE 144Hz 24.0" Monitor ($266.99 @ B&H)
Total: $2503.41
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-01-03 01:44 EST-0500)

PCPartPicker part list: http://pcpartpicker.com/p/2uCqJ
Price breakdown by merchant: http://pcpartpicker.com/p/2uCqJ/by_merchant/
Benchmarks: http://pcpartpicker.com/p/2uCqJ/benchmarks/

CPU: Intel Core i5-4670K 3.4GHz Quad-Core Processor ($219.99 @ NCIX US)
CPU Cooler: Corsair H100i 77.0 CFM Liquid CPU Cooler ($99.99 @ NCIX US)
Motherboard: MSI Z87-G45 Gaming ATX LGA1150 Motherboard ($119.99 @ NCIX US)
Memory: G.Skill Ripjaws X Series 16GB (2 x 8GB) DDR3-1866 Memory ($157.99 @ Newegg)
Storage: Samsung 840 EVO 250GB 2.5" Solid State Disk ($162.99 @ B&H)
Storage: Samsung 840 EVO 250GB 2.5" Solid State Disk ($162.99 @ B&H)
Video Card: EVGA GeForce GTX 780 3GB Video Card ($509.99 @ TigerDirect)
Case: Corsair Vengeance C70 (Black) ATX Mid Tower Case ($139.98 @ OutletPC)
Power Supply: SeaSonic Platinum 860W 80+ Platinum Certified Fully-Modular ATX Power Supply ($183.98 @ SuperBiiz)
Optical Drive: LG WH14NS40 Blu-Ray/DVD/CD Writer ($49.99 @ Newegg)
Operating System: Microsoft Windows 7 Home Premium SP1 (OEM) (64-bit) ($81.99 @ NCIX US)
Monitor: Asus VG248QE 144Hz 24.0" Monitor ($266.99 @ B&H)
Total: $2156.86
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-01-03 01:45 EST-0500)


PCPartPicker part list: http://pcpartpicker.com/p/2uLdf
Price breakdown by merchant: http://pcpartpicker.com/p/2uLdf/by_merchant/
Benchmarks: http://pcpartpicker.com/p/2uLdf/benchmarks/

CPU: Intel Core i5-3570K 3.4GHz Quad-Core Processor ($199.99 @ NCIX US)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($29.98 @ OutletPC)
Motherboard: ASRock Z77 Extreme4 ATX LGA1155 Motherboard ($119.99 @ Newegg)
Memory: G.Skill Ares Series 16GB (2 x 8GB) DDR3-1866 Memory ($135.00 @ Newegg)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($59.98 @ OutletPC)
Video Card: MSI GeForce GTX 760 2GB Video Card ($249.99 @ Microcenter)
Case: Corsair 500R White ATX Mid Tower Case ($79.99 @ Newegg)
Power Supply: Corsair 760W 80+ Platinum Certified Fully-Modular ATX Power Supply ($129.99 @ Newegg)
Optical Drive: LG WH14NS40 Blu-Ray/DVD/CD Writer ($49.99 @ Newegg)
Operating System: Microsoft Windows 7 Home Premium SP1 (OEM) (64-bit) ($81.99 @ NCIX US)
Monitor: Asus VE247H 23.6" Monitor ($129.99 @ NCIX US)
Total: $1266.88
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-01-03 01:45 EST-0500)