What is the point of knowing the refreshes of the model? Like, if you go to about mac on the menu, you could see when MBP was released. Is there a minor hardware changes as the time goes by? I thought they change hardware every year? What is the difference between early 2011 and Late 2011 model? Also, anyone know of a good monitor that I can use for Photoshop? Trying to get 2 monitors.. I heard thunderbolt display is too glossy!