Thanks for the replies all.
Considered a tablet, but thought there were too many distractions. I wanted to use the device solely for reading. But I guess if I can't focus with a tablet then I have larger issues
If I go the tablet route, what's the best for highlighting and managing notes on PDFs? ~$200 price range (down to pay a lot less if there's not much difference for what I want to do. I just want it to work quickly/reliably).