I see that you're mentioning scientific papers here. In my opinion, no 6" display can display scientific papers adequately. You need a larger screen for that. I am going on the assumption that these technical papers you are referring to are PDF. If so, you definitely need a larger screen. If you must use a 6" display, you will probably need to manipulate the PDF so that it can fit into the 6" display in landscape mode. I don't have any Sony readers but this is the same method I use with my 6" Astak Mentor.
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