As a professional photographer, I'm still using my early '11 2.2Ghz i7 17" every day; mainly Lightroom and PS. I'm aware my machine is getting on a bit, but I can't bring myself to get a 15" retina as I have 2x 1TB SSD's in my 17" - I need the space (I work long projects with a lot of images) albeit that about half of it is used for my music and personal stuff. But I just don't like the idea of an external drive. What are other people's views/experiences on this? Will using LR and PS on the latest 15" feel lightning fast compared to what I'm using now? I don't feel frustrated by lack of speed currently, but then I haven't tried the latest & greatest MBP - speaking of which, if I do upgrade, I imagine I'm better to wait for the Skylake. I'd greatly appreciate others' views on the above.