Dell XPS 8930 or the Smart Computers Twitch Streamer PC

[Samtastic]

Hi Guys

I am planned on changing my Dell XPS 8920 soon and I was wondering - what system shall I get?

A Dell XPS 8930 with a six core i7 or the Smart Computers Twitch Streamer PC with lots of storage and 32GB of RAM?
https://www.smartcomputersbristol.com/gaming/

or
http://www.dell.com/en-uk/shop/desktops-and-all-in-ones/xps-tower/spd/xps-8930-desktop

 

[Cisco001]

What is the main use?
What budget?

 

[Samtastic]

My budget is up to £1800 and my main uses are streaming games on Twitch and opening Unity projects and making my own games.