Chuck I have a 788ci and I am sold on the GPS part of the unit, much more than I thought I would, you can see were you are going, were you have been, and like you caught fish on deep point you can sit in one place and find every deep point on the lake, I think the 788 would be 200 or 300 more, but be worth the wait. when I got mine the down imaging was not available, I would try for the 788ci di this is Humminbirds price I think you can do better than that on line http://store.humminbird.com/products...ci_HD_DI_Combo JMO
Gary



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