Most of the 2005 options that have been discussed on this forum appear in the order guide. One that I don't recall is the black exterior trim replacing the brushed aluminum trim. Many people have complained of the aluminum trim so this should help.
I see that the DVD based PCM conflicts with the fire extinguisher so one would presume the DVD player will be under the passenger seat. That also means the PCM unit in the dash will probably go unchanged. A retrofit may only involve the addition of the DVD player and some software to make it work. It would seem this would be the player for the video system that is to come later. Also interesting is the note that PCM offers basic audio information on screen with navigation information. I'm curious if that is different than the way the screen appears now.