SWTSMBO has a Sony 505, keeps her quiet for hours, will be useful for holidays as about 25% of the luggage we used to take was cheap books to be left at whichever resort for other guests to circulate. She's threatening to get me the Amazon "Kimble", much cheaper and has good reviews. Not only do they take the "Normal" bok downloads but also PDF's. Even with sunlight behind you, contrast on screen is good and the ability to change the font size makes for easy reading.
Regards Ian.