first off.. Go DEVILS
now that that is out of the way.. let's get to the excercise. Tony Horton is a great trainer and a smart guy.He's taken what many exercise guru's have practiced for years (muscle confusion) and brought it to the masses. That being said.. the P90X may be too much to start with and may be more than what you are looking for. You may want to look at the P90 program first. The P90 allows you to work yourself and get results and it also gives you alot of the same tools as the Xtreme program (fitness guide, nutrition book etc).
I think in the long run however, you need to take a look at these programs but then adapt them to what you want and your time frame. You can pull a few programs from each and then modify them to your schedule and keep the look that you want.
An important thing to remember here is that when you start a routine such as the P90X, you're going to want to really adhere to their eating regiment. Pay attention to the suppliment packages they offer because usually the first month of P90 is a high protein diet with moderate energy workouts followed by a week of yoga and stretching. Yes yoga is fun and can really really help your overall workouts and your results.
I think if you set your mind to actually following the program how it is made to be followed then you won't have any problem doing what you want to do.. but again, check out the P90 program before you start the X or the X+ versions of it.
or.. you may just find a trainer at a local gym who could help you just as much.