I have not included a Monitor or Windows 10...Windows 10 can be picked up for Ebay for £10 and if you need a monitor, then we might drop down the GPU to a 1050ti instead and maybe the CPU as well. The case can also be changed to suit your choice...
Overall the build is just a starting point and I am sure many others will jump in, but it is a Ryzen 2600 based system with 16GB RAM and a GTX 1060 6GB so will provide great gaming and 1080p and of course will allow you to upgrade further later.
Priced at £748.65
PCPartPicker part list:
https://uk.pcpartpicker.com/list/NghbdX
Price breakdown by merchant: https://uk.pcpartpicker.com/list/NghbdX/by_merchant/
CPU: AMD - Ryzen 5 2600 3.4GHz 6-Core Processor (£147.60 @ Aria PC)
Motherboard: ASRock - B450 Pro4 ATX AM4 Motherboard (£81.94 @ CCL Computers)
Memory: Corsair - Vengeance LPX 16GB (2 x 8GB) DDR4-3000 Memory (£135.97 @ Amazon UK)
Storage: Kingston - A400 240GB 2.5" Solid State Drive (£31.19 @ Aria PC)
Storage: Western Digital - Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive (£35.76 @ Aria PC)
Video Card: EVGA - GeForce GTX 1060 6GB 6GB GAMING Video Card (£225.46 @ Amazon UK)
Case: Corsair - Carbide SPEC-04 (Black/Gray) ATX Mid Tower Case (£44.39 @ Aria PC)
Power Supply: EVGA - 600W 80+ Certified ATX Power Supply (£46.34 @ Ebuyer)
Total: £748.65
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2018-10-21 17:15 BST+0100