I have a D3 and a F90BT, and in most cases the D3 is the better unit (except for bluetooth, marginally)
Have they changed the following?
1) Phone call made over bluetooth currently disconnects when the car is shut off. On the Kenwood units it transfers back to the phone. Very handy feature. There have been a few times where I've been on a call and had to sit in my car until it was over.
2) See #1. It's a really important feature.
3) Any chance of destination lookup by phone #? I really like looking up a destination by # on the D3 (even though it's a little outdated now)
4) The F90 always switches to nav when a call comes in. Really annoying.
5) The ipod keeps playing while on a call, so when you hang up you are 6 songs away from when the call started. How about pausing the ipod when a call comes in?