Double cases.
PhantomMenace/Phantom Edit
Attack of Clones/Attack of Phantom
ROTS/ROTS extras
SW:GOUT /SW:R
ESB GOUT/ESB SE
ROTJ GOUT/ROTJ SE
The Ewok movies and Musical Journey are in a DVD wallett, and that's all I own.
In fact, the only movies I have on a shelf at the 6 Star Wars, my deluxe LOTRs, Starship Troopers, and Wrestlemanias 19-24.