Entourage Edge (EE) has 9.7 inch e-ink screen and offers 'journal' function to let users make handwritten notes. Of course, you can also annotate PDFs as well.
One thing to note is that the weight is around 3 lbs so EE is not particularly light. If you need a light weight note taker, EE may not be a good option. Otherwise, it is very good ebook reader and note taker overall.