I am looking for advice from some seasoned vets on what kind of detector to buy. I hunt mostly MA and NH beaches and have an at pro but want to get a real salt water machine. Was wondering if people that hunt these areas would recommend a pi unit or an excal. Just curious how much iron is in the water in this area and if anyone out there that hunts these areas could chime in. Any and all help will be greatly appreciated. Thanks in advance.