I have 5012 and like it very much. The large screen allows you to have 3 windows open and not have to squint and stop driving to find what you are looking for on the screen. The touch screen really makes it easy to operate. Maps are not cheap and the vision maps (pricey) with all sorts of aerial images of locks, marinas, and bridges etc. are pricless when you have not been there before.
I don't have anything to compare it to. But I can assure you a large touch sreeen is never to big if you are spending serious time at the helm.
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