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If you search,,,,you will see that Pioneer Z1, Eclipse and a few other companies make DD units as well. I personally have the Alpine W-200.. It is a great unit and provides everything I am looking for...But,,,if you are interested in NAV, I would recommend you check out the other mentioned units,,for the NAV addition for the Alpine is like 1200 or so bucks...I guess it depends on what all you are looking for in a headunit..IMHO.