I downloaded the free topo maps for the states I hike drive and paddle at gpsfiledepot.com
A powerful small unit that your can change micro SD cards for greater map storage. It has tides as well. Plus you can use the Garmin website base camp for free. You can also pay an annual fee for their map site.
It isn't touch screen, but has a long on time.
I got mine for about $160. I think it is about the the best for the price.
EZ-Dock modular docks
Wall Mount Boat Racks
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