I do light gaming, some video editing, and some programs won't run on Iris Pro for rendering purposes. 750m is about $400 more than the Iris Pro with similar specs. So do I jump to 750m which would satisfy my editing needs but only half fulfill my gaming? Or do I use that $400 to get a thunderbolt 2 dock, and desktop card? From what I've searched, with a decent card it will out class the onboard graphics and surely improve productivity on editing applications. Thoughts? Anyone ever do this setup? Can you run it on your laptop or does it require an external monitor?