Hello I purchased the Lowrance unit but have not installed yet I fish mostly shallow water 50 ft and less ,the transducer that came with it is the 50/200 ,I did not ask that's what I was given when I bought it . Any thoughts from someone who has this unit as to if I should get a 83/200 transducer instead , also the 50/200 is a large transducer . Thanks for any input