that PC wont last very long, its gotta be equal (preferebly better) then the next gen console specs since that is what is going to drag down PC gaming (assuming you're going to use it for that)
in which case
- 8 core processor (altough one of the i7s will work fine too. Or a high end i5. AMD has FX-8.... and FX-9.... series)
- 8 GB of ram (although star citizen has a recommended 12 GB requirement and I can see that becoming a new standard for high end PC games)
- A decent Directx 11 card
as for PSU I think youre gonna look at 950ish give or take depending on what you get.
I would also recommend a copy of windows 7 if you can get it (if you arent building it yourself it might be hard since a lot of PC builder websites are already forcing 8 on everything)