I am getting ready for a new boat and I have used Lowrance electronics for years. I am ordering a new Ultrex trolling motor on the boat and wish to get the compatible Humminbird graphs. I am thinking of the Solix 15 for the console and have it built in. Which Humminbird should I get for the bow; another Solix or a Helix. Is the Solix preferred over the Helix?