E Book reader

[#1]

Hi folks.  I don't know if I am on the right forum.  I am looking at e books.  I have looked at a number of comparison sites and I am not yet any the wiser.  Could someone suggest a suitable one.  I would like one that reads files that I get from archive.org, also text and pdf.  I am not bothered about mp3, wifi or anything like that.  Expandable memory is a must.  I would appreciate some direction in this.
Thanks

[#2]

The best way is to go and try one if possible. If you want.to be able to annotate the text then one with a keyboard, expandable memory is not always necessary, e.g. I have a Sony 505 that has 192mb of internal memory enough for nearly 200 novels, most these days have 1-2Gb I can't see you needing more unless you want to carry your entire library with you?
E-ink is a MUST lcd screens  eat batteries and are harder to use long term, (mine lasts for about 3-4 weeks on a charge used for 3-4hours a day)
Screen size up to you but I find the 6" to be good, easy to handle and about the same size as a paperback book page.

[#3]

Thanks Hairy biker for your response.  The Sony looks a good option.  Just a couple of questions
What is the max size of sd card that it takes?
What file format would you suggest that I use from archive.org?
Thanks

[#4]

Mine will take 16Gb HDSD cards. Not sure above that.
I recommend epub for compatibility, easily convert to something else if needed. I also recommend Calibre to manage the reader and the library of books.