Suggestions on Fishfinders

What do you like?  How important is gps? What would you suggest with gps?  without?

I have found the GPS features of my fish finder to be very useful for the kind of fishing I do, which often involves downrigger trolling or jigging around underwater structures in deep water away from shore.  It allows me to return accurately to underwater structures or to areas where I spotted fish with sonar.  GPS also tells me how fast I'm moving over the bottom when trolling, which is particularly helpful when trolling in the wind.  But it might not be as useful for other kinds of fishing.  For example, if you do mostly bass or pike fishing along shorelines or the edges of lily pad beds, or you mostly fish in smaller rivers, you might not find it very useful.

I haven't bought maps for my fish finder yet, mostly because GPS maps aren't available for most of the lakes I fish in.  For now, I'm using paper bathymetric maps.  But I suspect that the GPS maps are real useful while fishing. 

I recently upgraded to a Lowrance Elite 4. It has the color screen and gps. I think gps is very handy for saltwater applications because you can mark that honey hole and find it again another day. For rivers and smaller lakes I don't think gps is needed because you have landmarks to help you remember. GPS may also aid in maintaining trolling speeds if you don't have a good feel for your gear. Another benefit of gps is obviously safety. It allows you to radio in an exact location as opposed to guessing, and it can bring you home if the fog rolls in, although I don't rely on it without a plan B. That's my thinking, hope it helps.

For all the reasons already quoted, I think GPS is highly desirable.  I have "honey holes" marked all over the state and Puget Sound.