I need help picking the right GPU, Motherboard, and any changes caused by them.

[Hayden Worlein]

So I have been planning on building a computer for about two years and saving money and spending it and whatever but after searching and finding some parts that I like and have a nice price I'm having second thoughts.
https://www.pccasegear.com/wish_lists/589229/Okay%20this%20is%20the%20last%20one%20for%20sure
Above is the link to my current build. I will have an LG 27MP48HQ 27" which is 60Hz and 5ms response time (if that makes a difference).
I will be editing youtube videos and music and playing games such as Smite and Battlefield. I have a cat so I will need big fans and the unit will sit on my desk but I need to know about the GPU, should I keep the 1060 or go up to the 1070? I'd prefer not to spend even more money but if it can't be helped then oh well. Also, I have looked at the Motherboard and I'm just not sure? Is ASRock reliable or is there a better alternative?
Also, do I need the 750 Watt power supply? The wattage of the system is about 296 so I would not need the 750 watt, is that right?

Thanks for the help, Hayden.

 

[logainofhades]

You do not need the Z170 board, and 750w PSU is more than you need, but the 10yr warranty is nice.

 

[Hayden Worlein]

You do not need the Z170 board, and 750w PSU is more than you need, but the 10yr warranty is nice.

Thanks Hades, but any recommendations for the motherboard? Or for the PSU? Also what is your opinion on the GPU?

 

[logainofhades]

Your options are limited, that is why I don't recommend shopping from one site. Shopping around gets you a better build, for your money. Chose a Z170, only because of price, here.

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i7-6700 3.4GHz Quad-Core Processor ($424.00 @ Shopping Express)
Motherboard: Asus Z170-P ATX LGA1151 Motherboard ($139.00 @ PLE Computers)
Memory: Corsair Vengeance LPX 16GB (2 x 8GB) DDR4-2133 Memory ($119.00 @ Scorptec)
Storage: Crucial MX300 275GB M.2-2280 Solid State Drive ($107.00 @ IJK)
Storage: Toshiba 2TB 3.5" 7200RPM Internal Hard Drive ($91.00 @ IJK)
Video Card: Gigabyte GeForce GTX 1070 8GB Mini ITX OC Video Card ($589.00 @ PCCaseGear)
Case: Thermaltake Versa C21 RGB ATX Mid Tower Case ($95.00 @ Umart)
Power Supply: Antec High Current Gamer 620W 80+ Bronze Certified Semi-Modular ATX Power Supply ($114.00 @ Umart)
Wireless Network Adapter: Asus PCE-AC56 PCI-Express x1 802.11a/b/g/n/ac Wi-Fi Adapter ($67.10 @ Skycomp Technology)
Total: $1745.10
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-12-20 02:06 AEDT+1100

 

[Hayden Worlein]

Your options are limited, that is why I don't recommend shopping from one site. Shopping around gets you a better build, for your money. Chose a Z170, only because of price, here.

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i7-6700 3.4GHz Quad-Core Processor ($424.00 @ Shopping Express)
Motherboard: Asus Z170-P ATX LGA1151 Motherboard ($139.00 @ PLE Computers)
Memory: Corsair Vengeance LPX 16GB (2 x 8GB) DDR4-2133 Memory ($119.00 @ Scorptec)
Storage: Crucial MX300 275GB M.2-2280 Solid State Drive ($107.00 @ IJK)
Storage: Toshiba 2TB 3.5" 7200RPM Internal Hard Drive ($91.00 @ IJK)
Video Card: Gigabyte GeForce GTX 1070 8GB Mini ITX OC Video Card ($589.00 @ PCCaseGear)
Case: Thermaltake Versa C21 RGB ATX Mid Tower Case ($95.00 @ Umart)
Power Supply: Antec High Current Gamer 620W 80+ Bronze Certified Semi-Modular ATX Power Supply ($114.00 @ Umart)
Wireless Network Adapter: Asus PCE-AC56 PCI-Express x1 802.11a/b/g/n/ac Wi-Fi Adapter ($67.10 @ Skycomp Technology)
Total: $1745.10
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-12-20 02:06 AEDT+1100

Hades, I did a little bit of research and the price was why I ended up on the Z170 board so thanks for that and the rest of this, I will have a look and get another opinion because it can't hurt and get back to you.
Thanks so much