I'm thinking about switching from my 21.5" iMac to a 15" rMBP as main computer. The reason is mostly because I'd like to have my Mac more mobile. My main activities outside of general web is photography and writing. I don't game anywhere close what I used to, but I have a PS4 for that experience. My main photo apps are LR5 and CS6 with Nik Plugins. I'm leaning towards a 256GB model with 16GB of RAM (with a 2TB external for storage of RAW files). Do you find editing on an rMBP good enough? Eventually, I may get a Dell monitor, but with street photography and family snaps, it's not that crucial. Thoughts?