"Memphis Belle" is a fine movie.
One of my favorite movies about the Eighth AF is "Twelve O'Clock High".
I have it on Bluray DVD and Fox did a superb job on the image/sound.
http://www.blu-ray.com/movies/Twelve.../21475/#Review
It is older (1949), but it used 12 real B-17s for the filming, many of the extras were actual WW2 USAAF veterans. The screenplay was written by two veterans who served in the 8th during the war. The film also uses actual WW2 combat footage for many of its combat scenes (one of the reason why it was filmed in B&W).
An excellent film, a real classic.