Hello
Buy american products buy Becker
Now from the german view Becker is the best price relation.
OK the Panasonic, Kenwood solutions give a Monitor for the same price but they are little toys made for parking lots or traffic jams and not a slick toll.
If you need a Display you have to go to the VDO Dytona ( formerly Philips CARin ) or Blaupunkt systems.
In germany the nav companys are much faster then the carthographs and the next generation will be able to update online and integrate actuall traffic orientatet solutions realtime.
Grüsse