Hello all, I'm looking to upgrade my mid-2010 MBP with a 2.4 i5. I am a serious hobby photographer and take some DSLR video as well. I want to buy a 15" MBP with retina screen and had a couple questions. If buying new, will I still see a significant speed increase if getting the 2.3 i7 16gb RAM but with only the Iris Pro graphics? Or should I just bite the bullet and get the one with Nvidia GT 750? For photo's I can't see it making that much difference, but for video editing I'm wondering how much of a better experience it would be. I'm using Final Cut Pro X, Lightroom 5 and CS5.