I have been looking around for a bag to carry my SP3 with keyboard. I want something with a handle (strap optional) and pockets to hold accessories, including the charging block and cables. I don't want it too tight. Neoprene would be fine. Leather, cloth, whatever. Black or gray. I was just at Staples trying out the different cases. Some too big. Some too small. Most without the above features. Still looking. Suggestions?