We had a 2003 Z4 and like our Crossfires the motor and trans are bullet proof. At 5'11" I fit better in the Crossfire than the BMW and lifting yourself out of it was even more of a task. The car sits too close to the ground and my wife and I nailed that low front end with curbs all the time. The side lower panels (plastic rocker panels) are also low and the front tires can actually throw things up and knock them loose. Overall a good car - but as a daily driver the body takes a terrible beating.
Today with Crossfire prices the way they are - the new BMW Z4 at $45,000 + does not seem like a wise investment for the same type of ride -- basically.