I am looking at both of these units in the 9 inch size for the boat. I went to a local Cabela's today to actually look at them and am impressed with both units. In fact, aside from resolution, cmaps and price, there isn't much of a difference between them. I have never fished a tournament but fish very often and am trying to get more out of my graphs (I currently have a hook2 5 tripleshot). Is the extra 800 bucks worth it to go to the HDS over the Elite FS for an advanced casual fisherman? I am really only considering the upgrade to get the most out of my new Ghost. I see the HDS as future proofing, but that's all I can come up with for a perk.