Opera - I think I'm going to get hooked

In this era of DVD, I finally am taking to opera.  In the DG 111 box I have, there are several operas which I have yet to view

• Der Rosenkavalier (Kleiber)
• Carmen (Karajan)
• Don Giovanni (Furtwängler)
• La Traviata (Barenboim)

I watched the DVD of Rigoletto (McVicar production) I have and I quite like it.  The most famous tune is at the start of the third act. I have another McVicar production on the way - Manon and I'm looking forward to listening to Natalie Dessay's singing.