Helix 7si is the best for the money. But if I was you I would wait a couple months because that unit has a second generation coming out. Not saying what but it is getting some cool upgrades and the retail price is not going up. Also si units are not the best for mounting on trolling motors. Since they read to the side when you turn the trolling motor you are turning the direction it reads. It can still be done but not really recommended.
