Im looking to purchase a Helix 7 si g2n mega for the console. I currently have a 9 mega G2N at the bow. I have an opportunity to buy a preowned 9 mega si g2n for about the same price as the new 7 si. I want to use the si for locating fish/cover/structure. So, would you purchase the new 7 or the used 9? Im leaning towards the new 7 mega, just not sure if the screen size will suit me. TIA

