Comicglass is pretty decent ...you can even set up a mediaserver for wireless in app file transfer etc...but I find it really difficult to go back to using Comicglass after using Comiczeal. ComicZeal is by far the prettiest and most polished comic/manga reader/organizer for ios. When it imports archives (cbz/cbr/zip/rar) it will extract the files and auto downsize pictures above a certain resolution though...so importing large amount of comics may take a while.