Humminbird all the way Dude!!!... made by Rednecks, for Rednecks!!!
Personally for me Johnny Bass, the Garmin only offers a dual beam transducer... I would go with the Humminbird triple or quadruple beam unit and transducer, your "cone" will be much larger in shallow water... and if you fish in a waterway that doesn't have shipping lanes, I wouldn't go over 2400 watts on a unit... but that's just me eh!