Quote:
Originally Posted by mocelet
This one alone rules out all eink readers except the iLiad, and the iLiad doesn't really meet this either. 4"x6" is ~10" diagonal, most eink is 6" diagonal, and the iLiad is 8.1".
That said, if you crop the margins from a paperback book it is much closer to 8" diagonal.

Err, your math is off. 4"x6" is barely over 7" diagonal. (Check your Pythagorean Theorem.)
The 6" eink displays are close enough for the OP's wants.
A 10" diagonal would correspond to, for example a 6" x 8" display, which is huge.