Thanks for the response, very helpful.

I do not think I would need an additional 2D transducer as I have a 778c HD on the console that I would keep for my 2D uses and use the SI/DI unit for side imaging and down imaging and the GPS. I realize it is not a silver bullet and I am mainly wanting to use it for locating bait more than bass, and to give me a better idea of some the structure on some of the lakes I am less familiar with.