There's a thread with a pic of the AVIC-F500BT and it looks like the face is detachable...why aren't the 700, 900, and 90BT the same? I've had a AVH-P5700DVD stolen from my car before, I'd like to see more in the sense of security. The flush-mounting and custom color features would help if the unit weren't littered with labels. Any ideas? Also, what's that about it being either "in-dash" or "on-dash"?