I love the pano roof in the E70. I always have mine open to let in more sunlight.

I think it was optional on the previous X5 or only available for the high end (4.8is), I have no experience with them.

The pano roof does make noise when going over a sidewalk into a parking lot for example, which I think is normal.

The navigation DVD spinning noise is annoying. And I even hear it when driving. I'm trying to find a way to silence it, but I have yet to find it.