How to build a killer gaming PC

http://www.theverge.com/2011/12/19/2639968/how-to-build-gaming-pc

My best friends computer finally died the other day so i'm hoping he'll finally buy a new one that can actually play some games. I remember reading this guys about 2 years ago and thought it would be good for him. The only thing is, that was 2 years ago.. I wanted to ask what you guys think of the guide now or if you know any newer builds for 1000$.

Thanks!