I'm a fan of all three films, and I own all three:
Buckaroo Banzai has a lot of extras... A retrospective featurette is included with the director speaking about the "real" Buckaroo Banzai. It's a hoot.
Rollerball (I presume you mean the original) is a great film with fantastically conceived action scenes which hold up against almost anything short of the Wachowski Brothers.
However, I voted for
Mad Max for these reasons: 1) It's one for which I've waited more than a decade -- a version with the original Australian accents. (The original release was very poorly dubbed, IMO.) And 2) The coolest subtitle commentary I've seen since
The Abyss. You read about everything: vehicles in the scene, the cost to film the scene, that Mad Max's home in the film is now available for summer rentals, on and on...
-Raf
"You can run -- but you can't hide..."