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!
AmazonSmile: Inateck 13-13.3 Inch Macbook Air/ Macbook Pro / Pro Retina Sleeve Case Cover Protective Bag Ultrabook Netbook Carrying Protector Handbag for 13" Macbook Air, MacBook Pro (Retina), Dark Gray: Computers & Accessories