No, I think the DVD medium for classical is a terrible way to listen to this music. You should the try the following Mozart box sets:
For a complete survey:
For solid performances of the symphonies:
For the piano concertos try this one:
For an outstanding performance of the Requiem:
Mozart has never been one of my favorite composers, in fact, I have degraded much of his music here on this very forum, but I think there is a lot of merit to "Requiem." This is the only piece I return to and come away feeling completely fulfilled emotionally and intellectually.
Good luck in your endeavors.