[Sirtel]

A Kobo ereader can do most of what you list here:

- list the books you're reading, with the percentage of how much has been read (and you can sync this data to Calibre, if you want)
- no advertisements; with a patch you can also get rid of book recommendations on the home page
- display series and series order
- you can edit the metadata of your master files in your calibre library and sync the changes to the files on your Kobo (not vice versa)
- the synopsis (book summary) is in the book details on your Kobo, taken from Calibre

Plus, automatic collection creating and management (you set this up in Calibre, based on tags or any custom column you want, and when you connect your Kobo to Calibre, collections will be created or deleted automatically on your device)

What you cannot do with your Kobo is switch the covers completely off. Thumbnails will always be there in your book lists.