I think Wimbledon had a lot of good quality matches too. The Williams sisters, Capriati, Davenport and Belgians were al healthy and playing well, and there were other rivals like Petrova who was in good form, and Sharapova, Asagoe and Kuznetsova. Federer, Roddick, Agassi and Scud were also playing at a very high level and made some great matches.
The Aus Open was also good mainly bc of the Roddick-Younes match and Agassis perfect play throughout the two weeks. The Serena-Loit match and Serena-Kim had high drama, but i dont think they were good in terrms of quality.