UK Gaming PC Build Help (£1500~ budget)

Hello buildapc,

I came across this post (https://www.reddit.com/r/buildapc/comments/6qp6k9/1500_gaming_pc_for_a_friend/)

and there are a few conflicting opinions on what is the ideal build

My PC would be for primarily for gaming, (overwatch most commonly), whilst streaming music / video on 2nd monitor.

first time builder also, but have friends who could help if needed.

I'd just like to get another opinion on the replies in that thread, regarding my own personal needs,

thank-you in advance for your help!