If your primary usecase is text, don’t get a color e-reader. There are significant downsides to the display quality for very little benefit.

If you are wanting to read comics, manga, or illustrated guides, then you will want the color.

I’m a big fan of the Kobo Libra design. It’s friendly to software mods and has a rail for holding it with a nice big button that sits under the thumb for page turning.

I find that the Kindle-style thin bezel gives no comfortable way to hold an e-reader since the only good place to put your thumb is on the screen, the primary input method. It leads to a bad experience and turns people off from e-readers.