Pelican makes a case I would swear by. Have used and cruised with them for years for my
laptop, and plan to do the same with my ipad. Check the Pelican website, but I believe the model for the ipad is 1065, wich will accomodate it without a binder- type cover. Others models may accept a binder. They have great foam padding, and are waterproof to 10 ft. If the o- ring is intact.