Will old cases work with the new MBP? It new one is thinner, so I would think the old cases would be too big. Of course, they're not much thinner so maybe not. I'm not looking for a sleeve, just a good quality messenger bag that will protect my shiny soon-to-be new toy. I've looked at the Incase and Crumpler bags, but there are others that look nice too. I'm just not sure.