Thanks for the input.(no pun intended). I like the fact that as you say you can replace the bare bones one and can add nav at that time for well under the $2500 that Toyota wants for the Nav. However integration, rear back up camera and bluetooth may make me choose it. As to the radio, In my 974R I replaced the factory radio with a pioneer and the sound quality is significantly better not just in base and treble response but in details. Thanks again.