I am currently running 2 humminbird helix 9” mega gen 3 , and also a 12 inch Garmin for my Livescope . I was considering upgrading my humminbirds to 12 inch units also . So my question is…. I am happy with the helix units but since I’m upgrading what is everybody’s opinion on helix or Solix ? Advantages /disadvantages. Likes / dislikes?