I'm impressed with all of these. Amazon now has tablet pricing that smoothly ranges from $69 -> $499, an outstanding value on 4G service, a quality e-mail client story that includes ActiveSync, necessary touches like parental controls, a substantial app library, all of the one-click content you can handle, growing mindshare that isn't contaminated with the stink of 'Android', and genuine technical superiority over the market monolith in a few areas.
This is going to be an extremely popular lineup.