I bought a lowrance Endura Outback (yellow, touch-screen, color display) a couple of years ago to use in my flat bottom... Not sure about the Garmin you are leaning towards, but I really like this one I got. It's easy to use, easy to see in the sun, and does everything i need it to. Only thing I don't like is the maps that are pre-loaded, horrible detail. I bought some detailed maps online, but it seems like they slow it down too much. I bet an SD card with maps on it would make a big difference.