DVD and Sagas
DVD films include the American and Japanese Versions. Also American versions may have added features for example, Lord Slug (Movie 4) has Rock music such as Disturbs Stupify where as the Japanese has its normal theme songs (not that theirs anything wrong with this).
Cell Saga - Whole Saga Available on DVD
Buu Saga - Half Saga Available on DVD
Dragonball Z Movies - Movies 1 - 5 Available on DVD