Lean and Mean and Enter the Red Zone are two that I can think of right now (because they are my favorites). I will need to look through my Spinnervals workouts. You can also preview the workouts on Spinnervals.com. Brenda rocks!!
Get both workouts!! If you get one now, you'll more than likely order the other one later. So just get both of them now.
That's my way of thinking anyway!