I use a case with a hard(ish) outer shell, where the ereader is suspended in rubber mounts away from the shell, for transporting my Glo. (I posted a
picture here, way back when I first bought it.)
I don't like reading with any sort of case or cover on the ereader, but this one suits me because it is quick and easy to remove the ereader from the case, and to put it back afterwards.