Is the neoprene the best sleeve with padded protection? I've decided to go without a hardshell case, and use a skin. I'll also be using a military style shoulder bag to carry my laptop in (and books, etc.), so the inside won't have as much padding as a bag designed specifically for laptops. So I need a sleeve that will have a lot of padding, or either be shell like, but a tight fit around the macbook as to not cause scratches.