I have a buddy that's looking to buy a new locator. He has a pretty tight budget and has it narrowed down to three units. He is looking at the new Garmin striker vivid series, the Lowrance Hook reveal and the Hummingbird helix Mega DI gen 3. He is going with a 7 inch model and the way I understand there is a difference in the Helix 7 compared to the Helix 8 and above. Just wanted to see if anyone was running any of these units thanks