I would like a computer that is able to run games (that have recently came out) on low-medium settings at 1080p. It needs to be around 500 - 600 pounds. (600 will have to include os and keyboard and mouse and possibly a headset)
This will be a very nice PC that will do any game at high, some on ultra. I did have an i3 so you could be under $600 so you could get keyboard/mouse but with this i5 you will be able to support any current gpu with no bottlenecks:
It depends - AMD in general, offers bang for buck and is more low/medium end whereas nvidia is in general suited for high end applications due to price, but have better performance.
This will be a very nice PC that will do any game at high, some on ultra. I did have an i3 so you could be under $600 so you could get keyboard/mouse but with this i5 you will be able to support any current gpu with no bottlenecks: