Mbp (lookin for bags)
I fail to see why the size of the MBP would a difference about the case. It would seem to me that the quality of the bag/case remains the same regardless of the size of your MBP, e.g. Be ez, Waterfield Designs, Booq etc. However FWIW, I have 15" MBP and currently carry my MBP in a Lowepro Backpack camera bag with my digital SLR. So, again what do you carry your MBP in?