Radar
It depends in large part, on where you plan to go. Although either can give you a good position fix, think of them as serving different purposes, not reduntant purposes. Of the two, only one can tell you if/when/where/how fast storms are coming; only one can tell you how fast and on what course our fellow powerboaters are aiming towards; only one can tell you the position of other velssels. You might be better served to get a radar compatible plotter now to which you could easily add radar after gaining some experience.DonIllusion