Humminbird helix 9 chirp mega si+ gps g4n cost $1549.99 and a Garmin Echomap UHD 93sv cost $699.99 this is a difference of $850.02 questions are 1. is hb that much better. 2. Can you see fish with the Garmin side view. 3. I am running hb899si now will the Garmin be as good of pictures as I have now with my old hb 899. I fish 1 to 13 foot water and deepest 19 foot in my lake. Mostly need to see fish on structure with side view. Thanks in advance for any advice.