Just echoing what the others are saying. I'm a researcher and initially tried e-ink devices when I wanted to go digital with all my research literature, but e-ink simply isn't designed to support serious research literature management. I use an iPad, with the help of the apps GoodReader, iAnnotate and Bookends (the latter syncs to my mac research library, but you could also use e.g. Papers or EndNote if you are using Windows). A lot of academic publishing houses also have separate apps that you can install on a tablet.
Here's one of my previous (longish, rant like) posts on e-ink versus tablets for academic work:
https://www.mobileread.com/forums/sho...23#post2237323