I will finish the series (currently in book 6) and have a movie marathon to celebrate!
I finished the books in September and in March of 2014 we bought a 55" LCD/LED TV and enjoyed the movie marathon. It took week of off and on watching. I was a bit disappointed in the movies in that they don't encompass the wonderment of Harry Potter that you get from the books, but they are descent movies and well worth the watch. That's what usually happens when you read something before seeing it on film.