I recently bought an Onyx Boox Android tablet with eInk screen for $340. It comes with a Wacom stylus included which feels kinda cheap (it's plastic) but works better than any other stylus I've owned before (and it has a proper eraser on back which reMarkable charges extra for).

I think the main draw for the Onyx over a reMarkable is that you get access to full fat Android and all the apps in the Google Play store. An iPad still provides more functionality since it can watch videos and take pictures (my tablet has no webcam, speakers, etc.), but for reading (books, web, HN, Reddit, webcomics, etc.) the eInk screen is just so much nicer.

I also run the Android version of Microsoft Office and use it with a Bluetooth keyboard as a typewriter.