Sharon Mann's "The Works: Cardio" is a really good bargain. It has step, kickboxing, aerobics, etc, and you actually CHOOSE what your workout will be - you choose a warmup from 4 choices, a first workout from 8 choices, a second workout from 8 choices, and a cooldown from 4 choices. And its a nice length - half an hour!

Of course, this is for DVD only

I do her Works: Yoga/Pilates each morning - it also has body conditioning segments. Excellent value