Check out the Onyx Boox Nova. Not the Pro version, as you said you don't need note-taking capabilities. The basic Nova, now called the Nova Plus. E-Ink, 300 dpi, 7.8 inch display, 32 gb internal storage, no SD card slot, adjustable warm/cold front light, Android 6.0. A representative from Onyx has said in one of these threads that several Onyx devices will get an upgrade to 9.0 eventually. The Nova could be one of them. Nothing official yet, though, so take that with a few grains of salt!
For more info, check
here.