Thanks, X5ers, for the info and advice. I'm going to take it. Just called a couple of dealers in my area to see when '07 X5's w/ sport package are coming in so I can compare the rides -- they're telling me a couple of weeks. Patience, patience...........

By the way, here's what I'm considering:
3.0si/Titanium Silver Metallic/Black Leather
Premium Package
Sport Package
Rear Climate Package
Technology Package
20-Way Multi-Contour Seats w/ Lumbar
Heated Front Seats
Satellite Radio
Running Boards