If you already have a DVD player, the choice is a no-brainer. The picture and sound quality of DVD is superior. DVD's have a much longer life-span than videos. Also, SNM is by far the leader in workout DVD production. With each DVD release, they have gotten better and better. The pre-mixes on the Intensity series are fabulous, and it sounds like they may be even better on the new series. Also, there are going to be some extra perks available on DVD that you couldn't get on video: such as a "music off" option that would allow you to use your own music.