With a small boat and electric mtor I assume you will be fishing ponds and small lakes and rivers. I would go with the Eagle Cuda due to the wider cone angle. The higher power narrow cone models are useful to separate targets in deeper water. Downrigger fishermen like them because they can show lakers right on the bottom. A less powerful unit might not pick the fish off the bottom and just show the bottom. I fish out of a bass boat and usually am in less than 50 feet of water. Most of the time I am in less than 20 feet so a wide cone works well for me. Fishing in shallow depths a narrow cone wouldn't show enough of the bottom to satisfy me. I mainly use the unit to show structure, bait fish and water depth. Seeing an actual fish on the screen is actually not that important to me.