I went with the Kindle and really wished that I could check out e-books from the library with it, but you can’t. I think I could read them on my iPhone though. One big reason I like the Kindle is the font size. The largest is huge and two font sizes larger than some of the other readers I looked at. I ended up giving my first Kindle to my mother. At 93, she’s almost deaf and her eyesight is not good. Having a font that is big enough for her to read has propped the window open on a world that was closing on her.
The Sony reader has 3 font sizes, and the largest is quite large. I don’t use the enhanced font, but it’s available through a button on the console.