D3 also has DVD Video Playback with DivX support/decoder and RGB button colors (can make the buttons light up any color you wish to match any car's stock interior lighting colors), new black graphical menu interface...
Overall, it's an upgrade in my opinion for the lower retail value of $1000.
And it has a memory function like the N3 so you can store your route, and still receive navigation while listening to a CD.
