$400 Steambox build

Hey, I was willing to spend around $400 on a steambox to use with steam os on my big screen tv.  I already have a keyboard and mouse, and the os will obviously be free.

This might be ok for $400. It's over $400 before discounts. Ideally, I would push the budget slightly higher to grab a 7790 or 7850.

http://pcpartpicker.com/p/2jVpM

You can add more RAM or an SSD at a later time.

The tek built a tiny budget pc just the other day check it out >  https://teksyndicate.com/videos/build-350-pc-plus-upgrade-options-cheaper-consoles

Specs:
Let's upgrade it: 

 

Just making sure, you know its a Linux based OS which means many current windows based games wont be possible to play on it right?