After watching this video again recently, I have revamped my review entirely. If you are going to purchase a dvd of Verdi's Macbeth, this is the one to get as of this writing, June 1, 2010, in my opinion. The singing is lovely, and the sets and costumes are modernist, but very true to the nature of the story. Everything works in this video.
The men all have beautiful voices and are anywhere from easy to hear to the tenor, who has a downright impressive voice. The Lady Macbeth is easy to hear, with decent coloratura, excellent diction, a voice that is not pretty, but is big enough to be effective for the character, and she looks great. Her angular look along with the costumes makes her the quintessential villainess. Even the ballet is effective in this video. I highly recommend purchasing it.
For a great audio recording only, I would go with the EMI recording with Sherrill Milnes in the title role.