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!
Satechi Type-C Hub for MacBook -- Here’s a way to improve that 1-port 12-inch Retina MacBook. Satechi’s compact Type-C Hub Adapter plugs into the side of the MacBook, adding three USB 3.0 Type-A ports, a Micro SD card slot, and an SD card slot. It’s available in gunmetal, silver, and gold to match each shade of your Macbook.
MacBook Pro -- That’s a nice upgrade. Aside from a thinner and cleaner design, the new MacBook Pro integrates what they call a Touch Bar. This multi-touch retina screen bar replaces the traditional function keys to provide a dynamic enhancement to your favorite applications. It’s slick. Everything else has been souped up as you would expect including a faster processor, faster SSD, better screen and quicker graphics performance.