Insanity vs. P90X

Options
I have been doing 20 minutes of elliptical or stationary bike and then doing supersets with free weights and machines for about 25 minutes, 5 days per week working the major muscles twice a week. I mix up my workouts every six weeks but am getting bored so I am considering doing Insanity or P90X for a change of pace. I would like to lose another 5-10 pounds by summer and get more definition. For those of you that have experience with one or both of these, how did they work for you and is one better than the other?