Yeah, the PDC yells at me several times each month. It's usually the rear sensors, particularly the rear side sensors.
Oh well - I had rear PDC on the old 330i, so I just didn't see how I could live without PDC on this larger beast.
There are many things I love about the X5 more than in the 330i. For example, the cargo space, the people space, the rumble of the V8, the softer ride, the AWD...
On the other hand, I miss making spirited turns, listening to the low rumble below 2000RPM in 2nd gear, the raw steering feel of the 330i.
That's why I'm following the release of the E90 really closely. If money permits, I shall keep the X5 until it dies, but hopefully a 330i E90 would be a fine addition to the stable as a weekend car to be driven only on dry roads.