The only good thing about humminbird is the Down scan Side scan are built in. You need the Stucture scan unit with Lowrance, another 500 dollars on top of your fish finder. I found humminbird a little more user friendly as well. I am looking at a 858 for my front deck at the moment. cheapest i have found is $ 729 on ebay new without the down scan 800 With. I have both the side scan and the down at the dash. just trying to figure out if i need it up front. I think you could get a pretty good deal on the 700 series . I know humminbird is running a cash back promo until june it think.
good luck



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