I've been asked to install a new submersible pump in a new well. I don't know much about pumps size, but here is what information I have been given. New well 600' deep, 5" casing, water at 200', 157gpm well produces, want to set pump at 350' and pump water into a 3,000 gal.tank near well head for irrigation and drinking in the future there will be a larger tank set a elevation of 80' above well head at unknown distance. We're lookig to get 40 to 50 gpm at 50 psi. If these goals are posible what size pump and brand is good. Thanks any information you can gave will be helpful.