I am going to update my primary depth finder. I don't know if I need a GPS in the unit or not. I have a GPS in my Ulterra Trolling motor that I am just now learning how to use. I like the new Lowrance Hook 5X (or 7) with the new "Chirp," technology and are at the max of my budget. The GPS adds $100 to the price of the unit. My gut is forget the GPS.

Any opinions are greatly appreciated.