One consideration: It is strongly suspected that Amazon isn’t clearing much profit on their hardware (and it is good hardware), so if such is your style, you might want to see what the state of the Kindle jailbreak/alternate ROM scene is these days (I haven’t checked recently).
Amazon, as ebook purveyors, are evil bastards; but (if it is still reasonably doable to crack a Kindle and get it playing nice with normal formats, I haven’t checked in several model generations), it doesn’t necessarily hurt to let them labor to provide you with cut-price, generally well regarded, hardware.
