If there was ever any doubt as to if you should get the widescreen version of a movie or the fullscreen version, check out The Letterbox and Widescreen Advocacy Page
Heh, that's an oooooold page... I remember showing it to people in the early days of DVD, when Blockbuster kept pushing Fullscreen discs, and I had to deal with people returning movies saying "the top and bottom of the picture are blocked out!"