[Quoth]

I read ebooks that are PD (about 90%) and ebooks from anywhere except Apple and Barnes & Noble. Even Amazon ebooks on my Kobo.

The Kobo Libra Colour is really 150 dpi vs a real 300 dpi on the Libra 2, Sage etc. It does have a 300 dpi mode for mono content, but the coloured dots in a 2x2 pattern are still there degrading brightness, contrast and resolution. It's also much darker. The modern mono eink can all be read in most indoor ambient lighting without the front-light. The Kobo Colour models and all colour eink needs a bright front light, or bright light, though greyer in full sunlight.

Kobo Libra 2 is 7″ and sketchpad works with a Kobo and most MS Pens. The Libra Sage is 8″ and has notebooks. But I'd not bother with the pen or notebooks or sketch.

Kobo supports title, author, collection, series and subtitle from Calibre. And ebook covers.

A Calibre Plug-in only needs your Kindle Serial ID (Can be copy/pasted from your Amazon account) to read downloaded Kindle eink compatible titles from Amazon. So don't dispose of Kindle or deregister!