All I can see wrong is that you may want to get an AMD 7970 instead of a GTX 770 if you're rendering and gaming. Also, you're psu should be fine, but just to be safe get about a 750 watt psu for better expansion in the future.
I kind a disagree with you because he is trying to use this PC as a workstation and doing more stuff with Photoshop, etc... he might wants to stay with nvidia card because of cuda cores. many of the application such as Photoshop will take advantage of cuda cores, so I would stay with GTX 770 or above! **BTW don't get me wrong as a "fanboy" or something you are correct that if wants to do more gaming kind of stuff then I would get 7970 or R9 280x**
Indeed the GraphicsCard is the big consern I have. I dont know with wich one I should go.
AMD or Nvidia. I just read a lot of the R9 290X (NDA is over). The 290X, a close to Titan card,,, but much, much cheaper. Or should I take the 780. Same price range but with cuda cores, which is good for 2D.