I recommend the CaseLogic case designed for the Sony 300, as seen
here. It zips all the way around, has thick foam padding over the screen and is very solid. The PEz fits perfectly, with just enough space at the top to slide a finger in for the screen lock.There's also just enough space for headphones. The only thing I can't access is the rocker switch on the side. The case folds all the way back when unzipped, so I can hold reader and case in one hand. It's also easy to slip the reader out of the case for reading. My reader tends to travel with lots of sharp bits (keys, pens, etc.), so I need the protection from things sliding in and scratching it.