The build you put together is decent, but it can be improved. I will do some small mods to it. What kind of digital work are you doing? It will dictate what brand of graphics you can get.
BTW, the 680 is over priced. The 670 is just about as good, however the 7970 is better for gaming, but not as good for some editing applications.
Will a six-core really make that much of a diffrence over the quad-core i7-3770k? I ask only because the i7-3770K sells at micro center for $230 vs $500 for the six-core. However if the gain is worth that much i may consider it.