So, after days of wiring I think I have finally got things the way I want. Out with the old Japanese speaking nav system and in with the new!! I also replaced the HUGE converter with a much smaller and powerful one (yay technology!).
The converter tucked away next to the passenger seat (bolted to the frame of the seat, but will not rub!)
New 12 volt fuse block installed in the passenger foot well. I would have liked to put it elsewhere, but this is what worked. I wired the fuse block so it would turn on with the accessory on the ignition.
The new headunit!! I went with a Pioneer
AVH-X3700BHS. The wife has the older unit (3500) and we really like it. The BT is nice, and the satellite radio is great!