To expand on what I said last night, here's
BOYZ N THE HOOD 
Special Features:
The Enduring Significance of Boyz N the Hood. All new retrospective documentary with Cuba Gooding Jr., Ice Cube, Morris Chestnut, Regina King, Nia Long, John Singleton, Laurence Fishburne and Stephen Allen
Friendly Fire: Making Of An Urban Legend
Commentary with director John Singleton
Deleted scenes
Screen tests with Ice Cube, Angela Bassett, Morris Chestnut and Tyra Ferrell
Compton's Most Wanted music video "Growin' Up in the Hood"
Tevin Campbell music video "Just Ask Me To"
And here's
DAS BOOT 
This is the 200ish minute Director's Cut
Special Features:
Wolfgang Petersen: Back To The Boat documentary
Going Deeper: Maria's Take, The Perfect Boat--The Director's Cut
Captain's Tour--Inside the Boat
The Battle of the Atlantic (1983)
Behind the scenes (1981)
Commentary with director Wolfgang Peterson