[eschwartz]

I've only ever had a Kindle, but it works great. There are several fonts, but I never cared enough to look at them. I can read it well enough already, so it's fine for me. It supports sorting by recently opened, title, and author. Also, you can create collections, which are like tags. If you have them, then you can also sort by collections, which dosn't show them outside the collection. (Or sort by one of the other three, and collection folders will appear on the booklist.)

Any sideloaded books simply won't have the awesome features of a book you bought from amazon: cloud backup, sync between devices, page numbers and public highlights. But Adobe DRM is not supported, so no sideloading drm'ed books. (And you can't convert them from ePub anyway.)

But don't let the conversion scare you off. If you use calibre (and every ebook reader should) you just select all books, click convert, then leave it running overnight. Piece of cake.

And since the 3.5GB in the Kindle Touch can hold about 3,000 average-sized books, you don't need expandable memory. If you read 100 books A DAY you will still have one month of reading on your Kindle. At a more reasonable but still exorbitant 3 books a day, you will have nearly 3 YEARS worth. I'm sure somewhere along the way you can get to a computer and swap them for new ones.
(Same logic applies to every other eReader, including the Kindle Paperwhite which has (shudder) a measly 1.5 GB and about a year's worth of books.)