Good Day Everybody. I am Planning to buy rMPB 15' mid 2014 model without dedicated GPU and I wonder: Will Iris pro graphics be sufficient to handle retina resolution. I mean will there be any glitches and freezes during scrolling, transitions, navigation, desktop and/or app switching etc. I am not interested in games and GPU intensive tasks like video editing. As I've heard 5100 graphics in 13' models suffers from performance issues and cannot handle resolution flawlessly, without glitches. Is this the case with 5200 too? Despite the fact that it has about doubled theoretical performance. Also, can somebody recall whether integrated GPU was not sufficient for basic tasks and macbook switched to Dedicated GPU (basic tasks including: several desktops with Xcode, safari, music/video playback and parallels running) Thanks.