I'm new to the iPad world, and have decided to use a thin shell/cover case, but wanted a sleeve of some sort to protect the device better in my bag. I don't need protection from the iPad being crushed (or the screen scratched, as the screen cover to the case will take care of that), but do want a bit of padding for the edge that will be at the bottom of the bag (when the iPad is vertical in the bag). The shell helps, but it won't protect it from a big bump. Most sleeves seem aimed at protecting front/back of the iPad, but not so much the edges. Does anyone know of one that does? Thanks in advance for your comments.