I really love the portability of the 13" but I think I may miss the graphics card you get with the 15... That being the case, I don't do a ton of video... very minimal. Mostly a ton of aperture/lightroom/photoshop and design work. I can't imagine the graphics card being used a terrible amount there but what is your thoughts? Also, it is it more draining on the 13" to be hooked up to a 5k? Finally, I know the 13" essentially blocks you out of any gaming, like with sim city 5 or Civ 6, right? I like my games at at least moderate to high graphics... Otherwise, whats the point? Thanks!