okay pals: most ethical ereader option, go
options tentatively include rooting my kindle if i’m on a supported fw
@rowan Kobo might be the best option for you. You can sideload non-DRM'd files onto all of the major ereaders, no jailbreak required, but a Kindle requires you to convert them to .mobi format first. This can be done with an app called Calibre, for free.
followup: ethical places to buy ebooks?