jeanmarie87,
To answer your question, it all depends on your goals. Now, I understand you have done 2 round of Insanity, and are looking for something a little more intensive to condition your body. My questions are, are you looking to add a little muscle (tone up), or add more cardio?
P90X is not as intense as Insainty, but will definitely still challenge you. With P90X there are 3 ways to go about it. You have the Lean option, which will increase your cardio, but will not make you look big a bulky. The classic option, can still keep you lean, or heavy up the weights for a little more bulk. And of course, there is Doubles, which you can add size, or stay lean, but at least 3 times per week starting at Phase 2, you do 2 workouts per day.
I would not recommend you doing an Insanity/P90X hybrid until you have at least completed each program at least once already.
If this does not interest you, as sorlen suggest above, you can try for Insanity Asylum.
If you have any more questions, I'll be more than happy to answer them for you

- Andrew