I'm thinking of putting a D3 in my truck. I want to start listening to the music on my MP3 player (Xen, not iPod) and I need a navigation system and back up camera pretty bad.

I like the D3, except...

1) I don't want to buy an iPod (and accessory interface) to play my MP3 files

2) I don't want to buy the USB accessory interface to use my Xen because several people have mentioned its terrible.

3) I don't want to be buying updated map software all the time.

Any chance that a D4 model would fix some of these complaints ?

How long has the D3 been out ?

I am strongly considering purchasing a Nokia 810 as a substitute. Its seems as though once could make it do just about everything a D3 could do for less $$$$ ? If only it had a larger touchscreen ?

http://www.linuxdevices.com/news/NS3669465936.html

BTW: I have a Pioneer DEH something DIN 1.5 CD/Radio right now. I love it.

Sounds like you just need to buy a midget to hold your Nokia 810 and tell you which way to go then run behind the car when you are backing up.

The 810 has USB ports. A simple USB camera would probably work pretty well for a back up camera.

The 810 could play MP3s through the FM transmitter. And the 810 has GPS and CHANGEABLE Nav software built in. And it has WIFI and a keyboard.

Sounds like you already have an answer.

Pioneer navs usually come out in Spring. Ask all your questions after CES in January and you might get some answers

Thanks