I am thinking (again) about buying a fish finder. Would love to keep the cost around $200 ( less is better), but willing to listen to what others think. I mostly fish in eastern NC, and mostly freshwater fish, but will do a little lake fishing also. I fish inshore salt, some lake fishing, mostly river and creek fly fishing for bream, etc. Not sure about DSI, or SI, or GPS. I know this has been hashed over many times. I just got done looking through some past threads on this. Most likely I'll mount this one on my 14 ft jon boat. I also have a kayak, but don't fish on it very often now.