So I have the original 2012 15" Retina Macbook Pro with 8 GB of RAM and a 256 GB SSD. It is still worth some money so I was thinking about getting a new Retina Macbook Pro with 16 GB RAM and 512 GB SSD and selling the current one to help pay for it. The thing is I am not sure whether I want another 15 inch or a 13 inch. Most of the time it is on my desk on a stand connected to a monitor so being used mostly as a desktop. I have thought about an iMac but my fear is I won't have room. I do telecommute and now I can just connect my work PC to my existing monitor via Mini Display port. I still need to do that after so a Laptop is a better choice for me. I like to 15" because it gives me a bigger screen work with but with the 13 inch I could operation in Clamshell and buy a second display. Thoughts?