Hello, I'm making my first gaming build and would like some help. I intend to play Overwatch which I know doesn't require loads from a PC but I also want to play other more demanding games such as Fallout 4. I'd like to play with the high resolution pack and maxed out settings, at 60-90fps. I intend to get a 2560x1440 monitor.

This is my first pc and I want to get a lot out of it happy to spend £1200 on it. However I don't have a monitor, keyboard, mouse, speakers, or headset. So at the moment I'll likely spend around £2000.

As you can guess from the £ symbols so far I'm from the UK.

https://uk.pcpartpicker.com/list/mrDTRG

Here's my build, I already have these headphones too:

https://www.amazon.co.uk/Sony-MDR-7506-Professional-Headphone-Black/dp/B000AJIF4E/ref=sr_1_1?ie=UTF8&qid=1492086122&sr=8-1&keywords=sony headphones studio

Do you think this is a suitable build and my headphones will be ok? Also unsure as to what software to get. I have an office 365 card that has been used on my laptop and I'm unsure as to whether I'd need a new one for a new device? I have microsoft security essentials on my laptop, any suggestions for antivirus?

Any and all advice and criticism is welcome, it's a lot of money to spend and I want to make sure I get it right!