Thanks oj88 for the comprehensive info.

One last thing, yung nabibilhan ba locally ng Kenwood HU, do they do installation as well? Ang option ko sana is, kapag napag-ipunan ko na, papa-install ako nung Kenwood HU plus the Garmin module and the interface module, kung baga packaged deal... OR if I have the chance to buy cheaper from abroad, I will just bring it to local Kenwood dealer for installation if that's even possible.

If that plan would work, then I can just sell my non-GPS AVT unit.

I'm now convinced that a Garmin GPS would be better than an AVT GPS. Kahit sa reputation pa lang, iba talaga ang Garmin.