I agree with most recommendations here. Kindle or Sony. Kindle has easy access to some newspapers and magazines (subscription based or single issue fee) so that's something your wife might like. I have a Sony myself and love it.
Your plan to de-clutter will be essential once your baby gets into the toddler stage. Books on shelves are just toys, toys, toys to toddlers. Half of my books are just boxed up right now because I have 2 preschoolers, and they just ran around with those books and stacked them up everywhere. Ebooks are much easier to keep out of reach.