Separate Water Pump? and Recessed Shower Fixture

I am going to put a recessed shower fixture in the shower area (basically one of these: Whale Marine - Products)

Is there a better brand? I don't like that the shower head is so small, but I'm having a hard time finding something larger....suggestions?

That brings me to my other question, regarding a water pump. Does anyone think I'd need 2 water pumps? Or would one, for the whole trailer suffice?



Thanks!