Im looking at the pioneer avics for my escape. whats everyone's view on this? do i go with the avic f90bt...which is an in-dash model? or just get the avic f500bt which i just mount? both have the nav, handsfree bluetooth, ipod controller, voice recognition, which is the main components im after...besides the fact the f90bt can play dvds. but the 500 can via usb or off an sd card. ??? price difference is $400 by the time i buy another faceplate and wiring harness. just curious on everyones opinion?