I am looking for one that can read electronic text books. The important thing for me is the capability of writing notes and draw diagrams with different colors pen and store it onto the ebook. It would be nice to be able to use it for MS words and wireless internet capability so I don't have to carry my notebook on travel. I guess a 10 in screen is big enough. Any suggestion and advice? I have a few important text books in pdf files, it there anything that I can read, write notes, hand draw diagrams onto the pages and store it onto the file?