My '05 LE is not equiped with the tech package. Don't really want to spend the resources in installing one in dash for this vehicle. Portables such as the Garmin nuvi 350, Garmin c340 or TomTom 700 are becoming popular and are transportable between vehicles. I believe the nuvi also has a built in mp3 player. Does anyone have experience in using and mounting one like these in the Armada? Rather than using a windshield mount somehow attaching it, when in use for trips, to the flat holder area on the non-nav housing.