Im going to redirect you to an useful article, where the author explains about what is superior about Kindle DX compared with the old one Kindle 2. Author explains about how Kindle DX open electronic formats what is the difference between kindle2 and kindleDX and explains about what are the innovative features of kindleDX compared to kindle2 and finally author explains about the disadvantages of KindleDX very interesting informative article to read.
Read this article from this below source.
KindleDX Advantages and Disadvantages