The issue lies in power. Lit screen or not, the device needs to be able to call up 250GB or more for a comic collection. For that, I haven’t found an ebook reader barring BOOX products, which are higher-end, luxury Android ereaders with power to match their cost.

A Kindle 4 is a great ereader with a lot of life left - if you like books. Manga snd comics?… stick to a modern ereader or a tablet.