Well I dont use the nav. nor do I watch movies. I really just like the larger screen. Ive been thinking of selling my D3 and getting the 7900bt. I feel as if I spent alot of dough for just a larger screen. Dont get me wrong the D3 is sweet h/u but is the 800 I spent worth it for me? I like the idea of the bluetooth built in on the 7900 but man do I wanna sell my D3 to get it? I know I could just buy the bluetooth adapter for the D3 but I dont know....... Anybody understand? Or am I crazy?