I keep seeing these great screens and gps maps and wonder do I really need all of that. So looking for someone who knows to tell me. I fish big sandy on KY lake and do not move from that area. The water is 30 feet at most. Used to fish up there years back and catch fish every time on the lake now I am retired and fishing again and it is hit or miss with miss most of the time. Got another boat and do not like the fishfinder that is on it eagle with a small screen. I fish long line most of the time plus some spider rigging and brush fishing, almost always for crappie. Have been told that with the GPS finders that the maps are not much use unless you buy maps from another company and that humminbird does not have the big sandy maps at all. There are 20 dg and 60dg transducers which is best for my type of fishing will be on the trolling motor. Is color that much better and side scan worth the money for what I need it for ? I have been looking at the 587 ci hd combo but is it over kill?