E-ink reader below 250$ just for PDF-reading, highlighting and taking notes
I am looking for the perfect "relatively cheap" e-reader to read PDF without graphs, formulas or images (I would read mainly plain text pdf, journals articles above all).
I've found the following readers that should work well with PDF (and are not as expensive as the 9 inches ones):
Iriver Story HD
Pocketbook Pro 602
Bebook Neo / Onyx Boox 60
Is there any other, more appropriate, reader?
Which one would you buy if you were in my position?
Thank you all in advance!