Kindle DX! The best option for textbooks and newspapers reading!
E Ink – comfortable for the eyes!
Battery life: 7 days (wireless on)
Supported files: Kindle supports wireless delivery of unprotected Microsoft Word (DOC, DOCX), PDF, HTML, TXT, RTF, JPEG, GIF, PNG, BMP, PRC and MOBI files. Some complex PDF and DOCX files might not format correctly on your Kindle.
Wi-Fi, 3G, Text-to-Speech
Although the price of Kindle DX is higher, it’s perfect for students and researchers, because of its big screen. I tested pdf-s on my 6” Reader, they definitely need bigger screen!