Best overall e-reader value
Amazon Kindle Paperwhite (2013)
Amazon's 2014 Paperwhite has the same integrated lighting scheme but its processor gets a speed bump to 1GHz processor and its internal memory goes from 2GB to 4GB for the same $119.
Best ad-free e-ink reader
Barnes & Noble Nook GlowLight
While it doesn't necessarily beat the Kindle Paperwhite, the $119 Nook GlowLight is an excellent e-reader that's strongly worth considering if you don't want to buy into the Amazon ecosystem.