I have to second jswinden's conclusions. Then like him all I am looking for is a mobile device that is really made for reading books. I have a cell phone, but it is only for keeping in the car for emergencies, and so that is all it need be; a cell phone. I don't need a hand held device for surfing the web, checking e-mail, playing music, playing games, scheduling my activities (for me notes jotted on a wall calendar with a pencil still do just fine), taking pictures or recording videos; any of the things a tablet computer may be able to do. As far as reading for more than 15 minutes or so straight I find backlit monitors torture.

He's right about how to upgrade. After about a year to year and a half of using my Sony 505 I was able to sell it for enough to cover most of the cost of my new Daily Edition. The upgrade was worth it for the larger screen, ability to highlight and take notes, and more control of display options.