I am running a Pioneer Avic F700BT in my 'hoe. You'll hear a lot of people complain about the F-series nav units, I personally have only found a few bugs with it. The voice commands are kind of a joke, half the time they do not work. I've just adapted to not using them. (Every once in a blue moon I'll try it when I'm driving alone, just to see if it works or not.) Bluetooth, it works okay for me, but I don't hear the phone ringing after I dial, only after the other end picks up do I hear anything.
Would I get it again? Probably not. Performance is fine for what I use it for, but there are a few features it's missing that I would have liked. The only reason I mention it is that the price point is pretty good. I got mine for about $700, which for a full nav is not bad. The F-Series has been replaced with the X-Series now, and Firmware update 3.0 for the F-Series basically turns it into an X-Series.
can you use your onstar? and the steering wheel controls?
thanks