I use Hummingbird. The bigger the better as far as screen goes. I have a 898 HD SI and a 788 HD DI. H-Bird has great customer service and webpage.
The Hummingbird Side Image forum is a great place to learning everything from install, updates and use.
Whatever you get, leave the rods home and spend a day or two on the water learning how to use them. UTube has many H-Bird videos. I'm sure Lowrance folks have similar support.
TG



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