The Sound of Music
Limited Edition $60, 45th Anniversary Edition $20, both estimated street prices as of November 26, 2010
The biggest hit of the 1960s isn't everyone's cup of overly sweetened tea, but a great many people adore this 3-hour musical about love, child-rearing, singing, and escaping the Nazis. And just about anyone can appreciate the visuals, with their lovely alpine scenery and lush, Todd-AO cinematography (which used a frame size about 2.5 times the standard size). Of all the films I'm recommending here, this is the one I'd pick to show off what Blu-ray can do.
The 45th Anniversary Edition has the movie on Blu-ray and DVD, plus a second Blu-ray of special features. Across those three discs (which come in a regular case), you get the movie with two audio mixes, the sing-along version, assorted Bonus View items, and many documentaries.
The Limited Edition comes in a large box with two books (one a reproduction of the original souvenir program), postcards from Salzburg, a letter of authenticity, and a wind-up music box that plays "My Favorite Things." The standard Blu-ray case inside the big box holds the three discs in the Anniversary Edition, plus the soundtrack CD.
Second choice: African Queen: Commemorative Box Set