Thoughts on PC?

[Turtle]

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i7-7700K 4.2GHz Quad-Core Processor (£311.94 @ Aria PC)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler (£23.97 @ Ebuyer)
Motherboard: MSI Z270M MORTAR Micro ATX LGA1151 Motherboard (£119.98 @ Ebuyer)
Memory: Corsair Vengeance LPX 16GB (2 x 8GB) DDR4-2400 Memory (£104.99 @ Amazon UK)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive (£41.95 @ Amazon UK)
Video Card: Gigabyte GeForce GTX 1070 8GB Windforce OC Video Card (£347.94 @ Aria PC)
Case: Fractal Design Define Mini C with Window MicroATX Mid Tower Case (£67.00 @ Amazon UK)
Power Supply: SeaSonic 520W 80+ Bronze Certified Fully-Modular ATX Power Supply (£68.80 @ Alza)
Total: £1086.57
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-04-23 00:16 BST+0100

 

[Oreo]

your motherboard is actually expensive

 

[Taiga]

take some of the money from the motherboard and put it into the video card

 

[AdamEdits]

Awesome

 

[Hurt]

That's hella expensive

 

[n0tzach]

I would get a Ryzen but thats probably just me

I would highly suggest a m.2 or a SSD.

 

[MyNameIsAres]

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i7-7700K 4.2GHz Quad-Core Processor (£311.94 @ Aria PC)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler (£23.97 @ Ebuyer)
Motherboard: MSI Z270M MORTAR Micro ATX LGA1151 Motherboard (£119.98 @ Ebuyer)
Memory: Corsair Vengeance LPX 16GB (2 x 8GB) DDR4-2400 Memory (£104.99 @ Amazon UK)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive (£41.95 @ Amazon UK)
Video Card: Gigabyte GeForce GTX 1070 8GB Windforce OC Video Card (£347.94 @ Aria PC)
Case: Fractal Design Define Mini C with Window MicroATX Mid Tower Case (£67.00 @ Amazon UK)
Power Supply: SeaSonic 520W 80+ Bronze Certified Fully-Modular ATX Power Supply (£68.80 @ Alza)
Total: £1086.57
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-04-23 00:16 BST+0100

What will this computer be used for? If the answer is gaming then please be specific in the list of games you're gonna play.
If you have a budget we can also better determine what we could say needs upgrading or downgrading.