I own a Kindle and a Kobo, and the Kindle is the superior machine for me because Amazon offers unexpurgated collections of work for various classical authors. If you like reading classics, then you should definitely purchase a Kindle. I got everything written by most of the Golden Age Russian authors (Dostoevsky, Tolstoy, Goncharov, Turgenev, etc) for under $10. The deals are unbelievable. The Kindle is also marginally more user intuitive, and the battery life is way better. My one gripe is that you have to purchase a light separately, because having one built in supposedly compromises the ink quality. I can't speak for the Nook, but the Kindle is definitely well worth your money if your tastes are similar to mine.