I understand what you mean, but my reason for wanting the newer unit is so I can watch movies/play music directly from my alpine unit. The KCA-420i gives you the ability to control the ipod directly from the headunit. I am using AV cables for the time being on AUX 1 as a substitute until I can find someone who wants to swap and make a few bucks at the same time so I can do what I set out to do.

Using the AV cables is fine, except when I want to change the song I must try to navigate through the ipod where it would be much easier to use my headunit using the ipod interface mentioned above.