I have a 2001 540i, Dinan exhaust,throttle body, intake, chip on motor and transmission. This care is very fast and I love it. So, I went out and bought my wife the X5 yesterday as a surprise. It is a great sport utility vehicle and it is very fast..... Road and Track journalist were right when they said "there is not match" If you have to choose between 3.0 vs 4.4l... go with the V8 and add the sport package.... Have fun guys....