Ok..I have read all I need to read..seems people don't like his typing, his spelling, the fact (?) that he has money or his parents do. You rag about his decision to go with horns in the rear, to do surround sound or not, when all he asked was what kind of box should he go with.
I will help him out and give him the benefit of the doubt. First I notice he is from Jeddah, KSA, which I think is in Saudi Arabia. So his spelling and usage of english will be scratchy. Also since he is in Saudi, I would be willing to bet that maybe he does have money. For surround, he mentioned he wants video screens in the vehicle so that would justify the desire for surround. Horns, by design are not the easiest install out there, but once positioned right, it is hard for any component set to image as well. His amps appear capable to handle the power needed to generate some spl, and the subs are overkill yes, but why should that worry you?
I say the only box you need is to partition 3 boxes so that each 15 has its own airspace. Then all you need to do is trim it in for a smooth look.
I couldn't care less if your dad was the Sultan of Brunai...it sounds to me like you are getting quite the package. Good luck with it.