Of the cases in its Systm family, Incase's Systm Vise for iPhone 5 ($50) the the largest, and most heavy duty. It combines a rubber skin, lined with Poron XRD foam, a thick plastic shell that slides on from the top and bottom, and a belt clip. Even without using the clip, the result is a case that's over half an inch thick. The screen feels particularly set back under the layers of material. With the design, you do get Sleep/Wake and volume button…
