While hard cases for Appleís iPhones are a dime a dozen, Speck is one of the few manufacturers that makes hard cases for Appleís line of MacBook computers. However, although many MacBook owners looking to protect their investment from damage have been prepared to buy a Speck case in the past, a common criticism is that although tough, they come at the expense of added weight and bulk. Speck has tried to address this shortcoming with its new SmartShell for the MacBook Pro with Retina Display….