I do not think that it makes any differance by changing the star cast of the film as all are equally talented. What will make a difference is its story which sounds really interesting and also depends on the way our directors crafts it.
i think Ameir Khan is best actor than Akshay Khanna if he will be in this film then this film will be the film of the year make Amithab as their father and sanjay and Amair brothers the film will be super duper hit