I just competed my box and was about the throw everything in bu t iw as talk you shuldn't mount your amps right onto the box, why is this? Can anyone help me creat a amp rack for my set up?

 

There is nothing wrong with it provided the box is properly secured down. It makes the entire works a little easier to steal when it is all mounted in one location. As far as the box flexing, it would have to flex a ton before the aluminum heat sink which the circuit board is attached to would ever flex enough to crack a circuit board.

 

I've heard that before too: "Don't mount the amps to the box, the vibrations will be too much for the circuitry." I think it is crap. The vibration will not be too much more on the box than off the box.
Go for it.