Also have a look at the calibre plugin 'Kobo Utilities'. It has a lot of handy features.
Once you get your new toy, load at least one book in each of the 2 main formats (kepub and standard epub) so that you can make an informed decision on the pros and cons of each.
ETA: I see you're currently a Kindle owner. Some Kindle owners who buy a Kobo seem to get annoyed when their new Kobo doesn't turn out to be 'just like a Kindle but with a big screen'. Embrace the fact that they are quite different and enjoy the journey
