I am trying to wrap my head around crossover settings and some help would be much appreciated.  If I were to get the 5C, 4Ts as fronts and 4Bs as surrounds with the 8D for the sub, what would be an ideal crossover point for each speaker?  

I read the instruction manual for each speaker, but they differ in their suggested crossover points.  Some as low as 55hz while others as high as 100hz.  For example, If I do set the 4Bs at 100hz and the 4Ts at 55hz, what would be the best setting for the subwoofer, and what would I be losing if I went with one or the other for the sub?  Thanks in advance.