Wow!
30+ comments and nary a mention of {cough, cough} the iPad. Oh, how the mighty have fallen?
Personally the Paperwhite does what it says on the tin. Perfect for reading e-Books provided you can bare being within the Amazon walled garden.
The Kindle Fire does handle (IMHO) PDF's a lot better.
All moot now coz some cretin nicked both of them last year in the USA. Never bothered to replace them but I might as the hols are fast approaching.
Some very useful comments so far! Keep it up.