Kindle Paperwhite 2
How does one improve on arguably the best e-reader on the market? Amazon started with the screen and backlight, subbing in a higher-contrast display with a whiter background, darker and sharper fonts, plus more even front lighting thanks to a reworked front-light and guide. Other improvements include faster page turns, lighter touches needed to flip pages, less ghosting, and a variety of software niceties including more intuitive navigation, bookmarks, in-line footnotes, and the introduction of a vocabulary builder that stashes every word looked up in the dictionary for later revision.
Grab it at Amazon – $120 to $140