Well, it is kind of a personal preference thing but for your needs i very much like the nuvi 3597 for navigating and also just as a moving map. It does everything the 3590 above does in that regard but is one of the units i mention before that also gives you the name of the road you're on at present [at centre base of screen] also the address where you're headed to at the top, or if not navigating it just gives upcoming intersecting streets which is handy too.

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