I have an 11" Air that is kind of old, but I take it with me every day and use it to take notes at work or if I set myself up in a coffee shop and want to check out email or browse the Internet. The problem is when I want to do work, word process, or edit photos. Then I guess frustrated with the 11" screen and the Air's capacity to hold all the photos I want to work with. I thought about getting the 27" iMac with a SSD and then I'd be able to really sit and enjoy photo editing, which I only do as a hobby. When I went to order I saw that putting in all that I wanted and getting apple care, the iMac would cost abut $2500, without upgrading RAM which I could do after purchase. I then realized I would also need to buy a desk and make space in my apartment for having this large, but gorgeous machine so I went back to thinking about a laptop, more specifically the rMBP. How is photo editing on both of these machines? Can you compare to the iMac 27"? Thanks so much!