I HAVE THE 425 ON MY 19' GRADY AND I LOVE THE UNIT. I ALSO PRACTICED WITH THE UNIT IN My CELLAR LAST WINTER BEFORE HITTING THE WATER AND IT HELPED A LOT. I FISH A LOT IN THE SOUND AND ALSO UP OUT OF HAMPTON BEACH OFF THE ISLES OF SHOALS ON SCANTUM FOR COD AND THE UNIT WORKS GREAT. GOOD LUCK WITH YOUR CHOICE.