They have a few new units coming out. I'm trying to decide actually between a few of them.
AVIC-N2 - updated version of N1, single din unit with fold out screen. Plays DVD movies, only has 1 disc slot though so it's either nav dvd, movie dvd, or music cd/dvd. It does have a removable face for security. Not concerned with music CDs though (ipod for that) and don't watch movies while driving so I could just leave the navigation disc in.
AVIC-D1 - new model, full screen double din unit. Has two disc slots although DVD one only accepts navigation disc and won't play DVDs. I really like the idea of the built in full screen, but would miss the detachable face of the N2.
Both use their internal sensors to detect when vehicle is in motion and limit functionality of the navigation menus (and prevent movie playback for the N2). Depending on how limited the navigation menu is, it could drive me nuts. The Jeep one does that now and I can't stand it. With that in mind, the older AVIC-N1 (still to be found locally here) looks attractive as motion detection can be evaded (I'd do it for navigation purposes, no intent of watching any movies on this thing).