Those are good points. Thanks. The diesel is out of the question, unfortunately, because (1) I need the car now and can't wait 2 months and (2) I'm not sure that I will be able to get the eco credit if I take delivery after March 1. Plus, I don't want to complicate things for my dealer -- they have been super nice too me and offered me a great deal on the custom-ordered X5 3.0.