Hey guys.. hows it going? Firstly, I already own a late 2013 iMac at home for light gaming and garageband, fantastic machine! I have always considered getting a MBA for College work to do my essays and to be able to use while I am in lessons. I am an IT student so I spend most of my time on computers, and I have had enough of the constant crashes with their PC's. My question is, do you think I should go for the 11inch or the 13inch? As I am a student, I can get up to £160 off a new Mac. Plus I would be upping the RAM for the standard 4gb to 8gb. Also, is their any way I can downgrade for Yosemite to Mavericks? I already have the Mavericks install USB on hand, so would I just be able to downgrade? Thank you for your time!