Camalen makes some upscale iPad and iPhone cases and its Wallet Snap case, which is essentially a two-for-one case. You get a shell cover (in leather) that you can use on its own. Or you can slip it into the detachable wallet case to pick up added protection and storage for credit cards and cash. What's nice is that the inner case adheres magnetically to the outer wallet cover.
The Camalen Wallet Snap comes in four colors. It's not compatible with the 5S, but Camalen is presumably working on expanding the camera cut-out for the 5S' dual LED to make it compatible.