Your graphics card choice is a bit poor. You would be better suited with a 7870.
You're going to have a really tough time with only 64 gb to play around with until you get a large hdd. I suggest getting the hdd first, then adding the ssd later for your games if you decide on doing that.
If you end up getting the 7870, you'll only need around a 550w psu, which coupled with my other suggestions, should bring you to the same priced computer you have now, provided you're looking for your hardware in that right places.