There is another option….
the JVC KW-NT3HDT ($400 on ebay) is a double DIN unit, since I have installed it,
I have not looked back….except to check the camera!
Much safer option since the blind spot in our cars is HUGE! The 2 DIN system does everything including FREE traffic updates, FREE HD Radio (no add-on units to buy), great sound and I can even play movies on DVD or saved to a memory stick!