Now you GUY need to tell how long your hair is, of course!
Coconut shampoo: I do not think that coconut oil as an ingredient per se will make a good shampoo/conditioner, other factors play in as well.
But I have heard many good things about coconut oil myself.
Perhaps you could buy a small bottle of the shampoo in question or the oil (if your hair is long, and just rub it into the length. I do this with my oils all the time and use no conditioner) and try it out.