If you like big-screened e-ink devices you can scribble on, the new Kobo Elipsa 2E is well worth considering. It takes the good bits of its predecessor, adds some genuinely useful improvements ...
It will be a small change that could make a world of difference when writing on the Elipsa 2E or the Libra Colour.
However, if you were to ask me for a recommendation for an e-paper writing tablet, I'd probably suggest anything but the Elipsa 2E for one simple reason – how the Kobo Stylus 2 feels on the screen.