da-x, i dont want to argue about the loading and parsing, and paging of big text/html/xml files, it's just my own expirience, i am a heavy ebook reader, 1-2 books per week
the color scheme, according to researches made, should not be b/w or w/b, it should be something like black on on light brown, this way the eyes are not getting tired, and as a heavy ebook reader i confirm it