I am thinking about getting DS one of these for christmas. He is 11 and is a special needs child. He can read, but he is not grade level in his reading so he can not read the books that he would like to on his own. I had heard that there are audio books that you can purchase that would be great for him. I know nothing about either the nook or the kindle. I would love to have some feedback on pros and cons of both of them so I could see which one would be best for him. 

My daughter and I both have Kindles and love them!!
it! You can download audio books into it and since you can access the web it has a Pandora app.