I would like to offer this dvd set as a present and i am hesitating between buying the 2009 World at War release or the 30th anniversary one. I understand that the 2009 set includes the episodes introductions by Sir Jeremy Isaacs while the 30th anniversary set doesn't. But, does the 2009 set include all the bonus material ( interviews with relevant persons, the making of world at war, etc) that the 30 th anniversary does? Can somebody help me with this? Thanks!