Im having a hard time, trying to decide which Haswell rMBP to buy. the one with iGPU only or the one with iGPU/dGPU. For a guy like me, who dont play games at all, will i still make benefit from the dgpu? Im a graphic designer, i use Photoshop A LOT, and at the same time i use Parallels Desktop to run Corel Draw! in Windows while listening music through itunes or Spotify and of course checking my facebook from time to time. Do you think i need the dGPU? or should i go with the 2.6/16gb ram/1TB iGPU only ?? Thank you guys.... Any responses will be gladly appreciated UPDATE: i forgot to say that sometimes, i like to edit HD videos in iMovie... does iMovie benefits from dgpu? .