Let me get your thoughts on proposed upgrades to my build

[Blackboiz]

I am looking to upgrade my PC and monitors in order to run some of the newer games on max and do a little bit of streaming. I'm not really sure about the motherboard and the 1080 card so could i get some input on that?

FYI- I'm only getting the water cooling because someone is giving it to me for free.

Here is my current build:
PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i5-3570K 3.4GHz Quad-Core Processor
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($24.88 @ OutletPC)
Motherboard: ASRock Z77 Extreme3 ATX LGA1155 Motherboard
Memory: G.Skill Ripjaws Series 8GB (2 x 4GB) DDR3-1600 Memory ($46.99 @ Newegg)
Storage: Samsung 850 EVO-Series 500GB 2.5" Solid State Drive ($164.99 @ B&H)
Video Card: EVGA GeForce GTX 770 2GB Video Card
Case: NZXT Phantom 410 (White) ATX Mid Tower Case ($87.99 @ SuperBiiz)
Power Supply: XFX 650W 80+ Bronze Certified ATX Power Supply ($74.99 @ SuperBiiz)
Optical Drive: Asus DRW-24B1ST/BLK/B/AS DVD/CD Writer ($18.88 @ OutletPC)
Case Fan: Noctua NF-P12-1300 54.4 CFM 120mm Fan ($18.88 @ OutletPC)
Case Fan: Noctua NF-P12-1300 54.4 CFM 120mm Fan ($18.88 @ OutletPC)
Case Fan: Noctua NF-A14 FLX 68.0 CFM 140mm Fan ($21.48 @ OutletPC)
Case Fan: Noctua NF-A14 FLX 68.0 CFM 140mm Fan ($21.48 @ OutletPC)
Monitor: Asus VX238H 23.0" Monitor ($119.99 @ Newegg)
Monitor: Asus VX238H 23.0" Monitor ($119.99 @ Newegg)
Total: $739.42
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-11-19 21:54 EST-0500

Here is what i'm looking to upgrade to:
PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i7-6700K 4.0GHz Quad-Core Processor ($299.99 @ Newegg)
CPU Cooler: Corsair H100i v2 70.7 CFM Liquid CPU Cooler ($96.99 @ Best Buy)
Motherboard: Asus ROG MAXIMUS VIII HERO ALPHA ATX LGA1151 Motherboard ($251.98 @ Newegg)
Memory: Corsair Vengeance LPX 16GB (2 x 8GB) DDR4-2133 Memory ($77.99 @ Newegg)
Storage: Samsung 850 EVO-Series 500GB 2.5" Solid State Drive ($164.99 @ B&H)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($48.89 @ OutletPC)
Video Card: MSI GeForce GTX 1080 8GB GAMING X 8G Video Card ($649.45 @ B&H)
Case: Corsair Carbide Clear 600C ATX Full Tower Case ($109.55 @ Newegg)
Power Supply: EVGA SuperNOVA G2 650W 80+ Gold Certified Fully-Modular ATX Power Supply ($73.98 @ Newegg)
Wireless Network Adapter: TP-Link TL-WDN4800 PCI-Express x1 802.11a/b/g/n Wi-Fi Adapter ($38.89 @ OutletPC)
Total: $1812.70
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-11-19 21:55 EST-0500

 

[Aeacus]

If you were to upgrade your old PC, e.g reuse some of it's components then you'd be looking something like this.

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i7-6700K 4.0GHz Quad-Core Processor ($299.99 @ Newegg)
CPU Cooler: Corsair H100i v2 70.7 CFM Liquid CPU Cooler ($0.00)
Motherboard: ASRock Fatal1ty Z170 Gaming K4 ATX LGA1151 Motherboard ($118.98 @ Newegg)
Memory: G.Skill Ripjaws Series 16GB (4 x 4GB) DDR4-3000 Memory ($126.99 @ Newegg)
Storage: Samsung 850 EVO-Series 500GB 2.5" Solid State Drive (Purchased For $0.00)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($48.89 @ OutletPC)
Video Card: MSI GeForce GTX 1080 8GB GAMING X 8G Video Card ($649.45 @ B&H)
Case: NZXT Phantom 410 (White) ATX Mid Tower Case (Purchased For $0.00)
Power Supply: XFX 650W 80+ Bronze Certified ATX Power Supply (Purchased For $0.00)
Optical Drive: Asus DRW-24B1ST/BLK/B/AS DVD/CD Writer (Purchased For $0.00)
Wireless Network Adapter: TP-Link TL-WDN4800 PCI-Express x1 802.11a/b/g/n Wi-Fi Adapter ($38.89 @ OutletPC)
Case Fan: Noctua NF-P12-1300 54.4 CFM 120mm Fan (Purchased For $0.00)
Case Fan: Noctua NF-P12-1300 54.4 CFM 120mm Fan (Purchased For $0.00)
Case Fan: Noctua NF-A14 FLX 68.0 CFM 140mm Fan (Purchased For $0.00)
Case Fan: Noctua NF-A14 FLX 68.0 CFM 140mm Fan (Purchased For $0.00)
Monitor: Asus VX238H 23.0" Monitor (Purchased For $0.00)
Monitor: Asus VX238H 23.0" Monitor (Purchased For $0.00)
Total: $1283.19
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-11-19 22:53 EST-0500

But if you're going with completely new build then how about this.

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i7-6700K 4.0GHz Quad-Core Processor ($299.99 @ Newegg)
CPU Cooler: Corsair H100i v2 70.7 CFM Liquid CPU Cooler ($0.00)
Motherboard: ASRock Fatal1ty Z170 Gaming K4 ATX LGA1151 Motherboard ($118.98 @ Newegg)
Memory: G.Skill Ripjaws Series 16GB (4 x 4GB) DDR4-3000 Memory ($126.99 @ Newegg)
Storage: Samsung 850 EVO-Series 500GB 2.5" Solid State Drive ($164.99 @ B&H)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($48.89 @ OutletPC)
Video Card: MSI GeForce GTX 1080 8GB GAMING X 8G Video Card ($649.45 @ B&H)
Case: Corsair Carbide Clear 600C ATX Full Tower Case ($109.55 @ Newegg)
Power Supply: SeaSonic PRIME 650W 80+ Titanium Certified Fully-Modular ATX Power Supply ($151.99 @ SuperBiiz)
Wireless Network Adapter: TP-Link TL-WDN4800 PCI-Express x1 802.11a/b/g/n Wi-Fi Adapter ($38.89 @ OutletPC)
Total: $1709.72
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-11-19 22:45 EST-0500

Few words.

Reason why i picked different MoBo: http://www.tomshardware.com/reviews/best-motherboards,3984.html
Reason why i picked different RAM: http://www.tomshardware.com/reviews/best-ram,4057.html
Reason why i picked different PSU: http://www.tomshardware.com/reviews/best-psus,4229.html
As far as MSI GTX 1080 Gaming X 8GB goes, here's in-depth review to read: https://www.guru3d.com/articles-pages/msi-geforce-gtx-1080-gaming-x-8g-review,1.html

If the Seasonic PSU is too pricey for you, you can switch the PSU back to your EVGA.

If you're unsure which GPU to use, here's some further reading: http://www.tomshardware.com/reviews/best-gpus,4380.html