While OtterBox's new Commuter Series Case ($35) is pretty similar to the iPhone 4 model, the company's Defender Series Case ($50) isn't just a stretched version of the last-generation version; it has actually improved to go along with the iPhone 5. The first case is a plastic and rubber combo, with the soft material wrapping around the phone's body while the hard piece fits in place over it. Commuter comes with a screen protector film, cleaning cloth,…