For almost a year I have been reading....researching....and going to Academy Sports.......Bass Pro....playing with a lot of sonar units to see which one to put on my kayak. The model you are talking about does scroll slow...but the major issue with it is in marking a spot if you happen to have an Navionics SD in it. You have to pull the Navionics out and put in a blank SD card. That is a pain in the rear. The 500 and 700 series are no longer being made by Humminbird. You can still buy them but the 600 series is replacing both of those model lineups. I am looking at the 698 ci HD SI. To get a bigger screen I would have to go up to the 899ci HD SI....but that is a thousand bucks! Not saying I won't do that but right now it is looking like the 698 for me. The guys at Bas Pro are very helpful and the ones I have talked with are very knowledgeable. I was told a few months back to wait until both Lowrance and Humminbird had their new units come out...glad I did. For me being a Gill fisherman I want a side imaging unit so bad I can taste it....LOL. You can see Gill beds out in deep water that folks have no clue they are there....and you can even see the Gills if they are on the bed. Bottom line is to get the best screen one is going to have to pony up with the money. It is hard for me to spend more for a unit than what I spent on my kayak but there is no other way. I am afraid this is just the way it is. Lowrance is no different when it comes to price. I know some folks swear by one brand over the other but I have owned both and never had any issues with either one...of course that was about 10 years back when I had a boat...LOL.
Regards
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