Apple MacBook Pro 13-inch (Retina Display). It's not leather, but shouldn't it be? My current computer got me through my undergraduate work, but I don't think it's got the gusto to get me through my graduate work. If, and only if, you have a spare MacBook lying around, perhaps you could show me how well it fits in the bag!
Paris MacBook Skin / The Apple logo now seems to be an evident object visible from the Paris skyline as you cover your Macbook with this Paris MacBook Skin. http://thegadgetflow.com/portfolio/paris-macbook-skin/