Tony,
Greg summed it up very well also.
I would suggest taking the X5 down instead. After you're done with the M5 portion, you WILL want to try doing some of the things that you learned and that could be a bad thing for your poor unsuspecting M5.
One of the things that the instructors repeatedly emphasized was the fact that these M5's were all "N.Y.C." (Not Your Car) meaning that they wanted us to flog them out!
