Fingerprints really bug me on my iPad. I'm constantly wiping it off. But fingerprints don't show up on the Kindle. I guess they would if your fingers were really dirty, but it isn't like the iPad where even clean fingers leave smudges.
I gave my K4 to a friend when I got my Paperwhite. I prefer the Paperwhite enough that I know I won't use it again. I prefer to spread the ereader love.