I have a 2000 X5 4.4

I am looking to do a pioneer AVIC D3 Head unit or Pioneer Z1 Unit.

Which would you choose?

I am going to try to keep my stock speakers but I will have RCA's attached to the Head unit for an amp later on down the road.

I am going to have a sub and a sub amp installed and maybe do some sort of Back up camera.

My biggest concern is that I want to be able to play DVD video on the screen while driving. If you have either one of these units did you have problems getting video to work?

Any comments are appreciated. Thanks Greg