Needing opinions with upgrades to my pc build

What resolution do you intend to play at? A GTX 1080 may be overkill for 1080p gaming, with a 1070 likely more fit for purpose. Although >120Hz and for longevity, it may not be a horrible idea.

Ryzen presents a compeling offering. While Intel's chips do have a slightly better IPC, which will help in gaming - Ryzen's additional cores/threads without any *huge* tradeoff in clock speed should be considered carefully.

As for PC Specialist, that's a system builder as far as I can see? I'd suggest building it yourself - especially if you've spent the last year learning about components etc.

The build itself is ok-ish.
*A 7700K on Z270 is a solid gaming option (but again, consider Ryzen)
*You'd want DDR4 speeds >2666MHz....and if it's not specifying, assume JEDEC standard (2133MHz) which is not really optimate.
*An H55 is a pretty basic CPU cooler. If you want to overclock, I'd suggest a higher end Air or AIO cooler. If you're happy at stock, I'd stick with an air cooler opposed to budget AIO's.
*There's no PSU mentioned. Custom builders generally use whatever they have on hand (which they could buy in bulk for cheap), which rarely ends up being a quality unit.


I'd suggest somehting like this:
PCPartPicker part list / Price breakdown by merchant

CPU: AMD - Ryzen 5 1600X 3.6GHz 6-Core Processor (£220.00 @ Amazon UK)
CPU Cooler: Noctua - NH-D15 82.5 CFM CPU Cooler (£74.99 @ CCL Computers)
Motherboard: MSI - B350M PRO-VDH Micro ATX AM4 Motherboard (£69.98 @ Ebuyer)
Memory: Corsair - Vengeance LPX 16GB (2 x 8GB) DDR4-3000 Memory (£119.68 @ Amazon UK)
Storage: Kingston - A400 240GB 2.5" Solid State Drive (£71.97 @ Amazon UK)
Storage: Seagate - Barracuda 2TB 3.5" 7200RPM Internal Hard Drive (£55.80 @ Aria PC)
Video Card: Palit - GeForce GTX 1070 8GB Dual Video Card (£379.97 @ Amazon UK)
Case: Fractal Design - Focus G Mini (Black) MicroATX Mini Tower Case (£49.99 @ Novatech)
Power Supply: EVGA - SuperNOVA GS (UK) 550W 80+ Gold Certified Fully-Modular ATX Power Supply (£73.48 @ Amazon UK)
Operating System: Microsoft - Windows 10 Home OEM 64-bit (£83.70 @ Aria PC)
Total: £1199.56
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-07-12 17:35 BST+0100

That may need a separate AM4 mounting bracket from Noctua directly.

You could option for the 1600 with the included cooler - sufficient to OC some, and save a bit of cash.
PCPartPicker part list / Price breakdown by merchant

CPU: AMD - Ryzen 5 1600 3.2GHz 6-Core Processor (£187.00 @ Amazon UK)
Motherboard: MSI - B350M PRO-VDH Micro ATX AM4 Motherboard (£69.98 @ Ebuyer)
Memory: Corsair - Vengeance LPX 16GB (2 x 8GB) DDR4-3000 Memory (£119.68 @ Amazon UK)
Storage: Kingston - A400 240GB 2.5" Solid State Drive (£71.97 @ Amazon UK)
Storage: Seagate - Barracuda 2TB 3.5" 7200RPM Internal Hard Drive (£55.80 @ Aria PC)
Video Card: Palit - GeForce GTX 1070 8GB Dual Video Card (£379.97 @ Amazon UK)
Case: Fractal Design - Focus G Mini (Black) MicroATX Mini Tower Case (£49.99 @ Novatech)
Power Supply: EVGA - SuperNOVA GS (UK) 550W 80+ Gold Certified Fully-Modular ATX Power Supply (£73.48 @ Amazon UK)
Operating System: Microsoft - Windows 10 Home OEM 64-bit (£83.70 @ Aria PC)
Total: £1091.57
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-07-12 17:37 BST+0100

OR you could take a 1080
PCPartPicker part list / Price breakdown by merchant

CPU: AMD - Ryzen 5 1600 3.2GHz 6-Core Processor (£187.00 @ Amazon UK)
Motherboard: MSI - B350M PRO-VDH Micro ATX AM4 Motherboard (£69.98 @ Ebuyer)
Memory: Corsair - Vengeance LPX 16GB (2 x 8GB) DDR4-3000 Memory (£119.68 @ Amazon UK)
Storage: Kingston - A400 240GB 2.5" Solid State Drive (£71.97 @ Amazon UK)
Storage: Seagate - Barracuda 2TB 3.5" 7200RPM Internal Hard Drive (£55.80 @ Aria PC)
Video Card: Gigabyte - GeForce GTX 1080 8GB WINDFORCE OC 8G Video Card (£482.30 @ CCL Computers)
Case: Fractal Design - Focus G Mini (Black) MicroATX Mini Tower Case (£49.99 @ Novatech)
Power Supply: EVGA - SuperNOVA GS (UK) 550W 80+ Gold Certified Fully-Modular ATX Power Supply (£73.48 @ Amazon UK)
Operating System: Microsoft - Windows 10 Home OEM 64-bit (£83.70 @ Aria PC)
Total: £1193.90
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-07-12 17:37 BST+0100

OR, if your monitor makes it worthwhile, you can just about squeeze a 1080TI in there too

PCPartPicker part list / Price breakdown by merchant

CPU: AMD - Ryzen 5 1600 3.2GHz 6-Core Processor (£187.00 @ Amazon UK)
Motherboard: MSI - B350M PRO-VDH Micro ATX AM4 Motherboard (£69.98 @ Ebuyer)
Memory: Corsair - Vengeance LPX 16GB (2 x 8GB) DDR4-3000 Memory (£119.68 @ Amazon UK)
Storage: Kingston - A400 240GB 2.5" Solid State Drive (£71.97 @ Amazon UK)
Storage: Seagate - Barracuda 2TB 3.5" 7200RPM Internal Hard Drive (£55.80 @ Aria PC)
Video Card: Asus - GeForce GTX 1080 Ti 11GB Turbo Video Card (£649.20 @ Aria PC)
Case: Fractal Design - Focus G Mini (Black) MicroATX Mini Tower Case (£49.99 @ Novatech)
Power Supply: EVGA - SuperNOVA GS (UK) 550W 80+ Gold Certified Fully-Modular ATX Power Supply (£73.48 @ Amazon UK)
Operating System: Microsoft - Windows 10 Home OEM 64-bit (£83.70 @ Aria PC)
Total: £1360.80
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-07-12 17:38 BST+0100

Or some combination of those options (1600X + NH-D15 + 1080TI puts you a little over budget, but not by a lot).