Below is a picture of a case I picked up. It is made by Rhino Skin. Its extremely durable and protects my PPC like a vault! It also looks pretty good I think. (Its made of aluminum.) As you can see it has a slot for a spare SD card on the back of the front cover.
Below is a picture of the case closed.
I also use protective screen covers by Belkin. (They save the new screen against scratches). They are not easy to install without leaving fingerprints on them. But once you figure out how to do it....they are worth their weight in gold...(if preserving you're scratch free display is important to you).