What should I do make my room into a gaming setup?

[Madness1996]

I saw somebody had asked a similar question to this a few years back and you guys gave some good answers so I'm gonna go ahead and ask the same question.

The room I'm gonna be "converting" is medium-sized (it's not my bedroom, but the room next to it. My bedroom is too small for a gaming setup) and has a carpet floor, just for clarification. I'll go ahead and list it's contents:

- A spare bed

- 4 cupboards on the wall

- Chest of drawers

- Desk

- Gaming PC

- Razer Goliathus Speed Extended mouse mat

- Roccat Kova+ mouse

- Gigabyte Force K7 keyboard

- Old 32" Digihome TV

- Dell Inspiron N5110 that's 2 years old

- Xbox One

- Roccat Kulo headset and crappy HP headset

- Edifier E1100 Predator 2.1 speakers

- 2 giant Assassin's Creed 4 posters

- A big Nuka Cola poster

I have a budget of about £4000-£5000. And if it helps, my computer has an i5-3570K (running at about 3.40GHz I think), 8GB of RAM and a GTX 780. The Xbox One and PC are both hooked up to the 32".

Thanks guys!