Is the retina MB powerful enough to use programs such as photoshop and lightroom? As a pro photographer, my editing for clients will be done on my iMac. However for portability/travel/occasional edits, is the rmb ok or would I be better going for the 13mbp? EG, could it handle importing and storing 2000 25mb raw files if I was on a wedding overseas? I love the sleek look of the rMB, but am anxious it won't be powerful enough for me. All opinions welcome.