ezgo,
I will not post anything about the Lowrance unit as I do not have one, I have not run one and I just don’t get into the whole us versus them thing (though I will post to correct mis-information about our products). From what I heard though; the 597ci HD DI has additional sonar in the form of two conventional (or 2D) sonar beams and a higher resolution display. We have a great bunch of folks in our Customer Resources department. There are several of us that try and help with answering questions as well when we can.

Sorry but I gotta cut this short as I have a meeting in 3 minutes!