I have coordination/proprioception issues and chronic migraines as well as the obvious sensory issues. I am looking for something to read pdfs without the eye and arm strain from the computer or the eye strain from the small e-reader.

Because of my coordination/proprioception issues, I've had very bad experiences with touch devices.

I would prefer something with a large e-ink screen, buttons, no touch, and decent search performance and battery life. I might be able to handle something with an led screen, as long as I can turn it down enough, and as long as it doesn't use pulse-width modulation, bluetooth for an external controller, and enough preferences to disable touch gestures.

Any ideas how to find these?

I got a used damaged Kindle Dx and installed Librerator on it. Some odd bugs, but it works.