are you looking to play games? (im going to say you are in my build for you)
also whats your budget im just going to say you dont have one as of right now we can edit this accordingly
http://pcpartpicker.com/p/Iu8e
this should give you good gaming performance and good rendering
note:
-if you want to play game like bf3 maxed at 60fps then you will need to upgrade to something like a gtx 670/680 or hd 7970/7950 which will add about 200(or 300) on the total price
-If you are primarily going to just be editing then you should drop the 7870 and maybe get a crappy graphics card and then get a 6 core i7 it will add about 200 onto the price but if you drop the 7870 it will mostly even out
-if you are going to be editing a lot i recommend getting 32 gigs... the only problem with this is that you will also need to upgrade your operating system, this could add about 200 dollars to the final price, though if you drop the 7870 it will just about even out
Hope this helps