Ballistic's Tough Jacket Series Case ($70) is the latest multilayer iPad 2 case designed to stand up to rough conditions: this one flips the usual setup, however, using hard plastic atop soft rubber instead of the other way around. The first layer to cover your iPad 2 is shock absorbent silicone that wraps around the body of the tablet, bulging pretty significantly at the corners. A hard plastic plate with a piece of shock absorbent polymer built-in…