It's going in a Dodge Ram, the dash opening isn't 1DIN or 2DIN, it's Crysler specific. I have seen some very nice custom retro'ed 2DIN HU's including the Pioneer AVIC's (the only brand I'd consider, for that matter), but it becomes a very permanent installation - meaning once the hole is cut into the bezel and the surrounding supporting structure to accommodate a 2DIN HU there is no going back to OEM.
Plus the little guy will be either up front or in the rear with his brother and sister. (when they fight, he comes up front or he end up getting hurt...). A GPS display would be more convenient - not to mention the Gendarmes wouldn't see it and give me a rough time about having a video display where the driver can become distracted by it (i'd mount it low enough that it couldn't be seen from an adjacent vehicle.
I'll prolly just get another remote display and a small video distribution amp so all three monitors will work.