Wee got the Quadrilogy (Took their bloody time
) and all I can say is 'wow..'
Highly recommended to anyone interested in the saga.
Especially the 'ALIEN' storyboard is great, some cool scenes in it that sadly never made it into the movie.
AFAIK, there's an Blue-Ray version coming too with even more extras and rumours has it that some stuff about the new movie too.