[gponym]

I want suggestions what to look at for a device primarily meant to read academic journal and magazine articles and textbook-type books: that is, may have complex formatting and not read so easily on a smaller device.

(Separately, I plan to buy a smaller and cheaper more portable device for non-scientific everyday books and articles. Not discussing the smaller device here, but it will be an ereader.)

This larger, "academic" reader "device" might be an ereader or might be a tablet.

* Size? Not sure, have no experience with either tablets or larger ereaders. What has worked for you?

* I won't set a price ceiling here, but I hope to spend 300 USD or less. I am quite willing to buy used or refurbished.

* Not in a hurry--next 6 weeks or so is soon enough.

* Unimportant: Annotating; Placemarkers; mobile network.

* Nice but not essential: Physical buttons; WiFi.
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I prefer an ereader because

a) I find using them more restful on the eyes than my iMac desktop;

b) I am sure that LCD screens affect my sleep pattern and I am not yet convinced that apps like f.lux make them as good as an ereader in this respect;

c) ereader battery life dwarfs tablet battery life.

I might consider a tablet because

1) a larger screen tablet might cost a lot less (used) than a large screen ereader;

2) expect that PDFs will look better;

3) having color would help in some cases (a small minority of my cases, however, and I am willing to sacrifice color to price and convenience).

Any suggestions? Thanks.