Some guys need a more sophisticated iPhone case than the rubber one they bought at the store. EXOvault iPhone Cases ($79-$400) are certainly worthy of a second look. We assume the name is a cross between an “exoskeleton” and a “vault” for your iPhone. These iPhone 4 and 4s cases come in a variety of metals, including aluminum, brass, titanium, gold plated brass, all with wooden inlays and the option to add an engraved design. EXOvault iPhone cases are also hinged with a metal clasp, letting you access your phone quickly and painlessly.