Aaaand after trying the Aluratek and continuing to lust longingly for the PB360, I finally gave in and ordered one. The Libre is a decent ereader, but I think the PB360 will be much better for me, for many reasons. Thanks again to everyone who shared so much information that helped me make that decision!
Now I just have to try to control my eagerness and impatience until it arrives and I can name it 'George', and hug it, and pet it...