Traded in my 2006 Black Nissan 350Z for a base 128i with comfort access since I needed the back seats and man, I can't stop driving it!!! Compared to the Z, I am getting better MPG and I get the back seats! This is the most fun car I have ever driven.
Handling, cornering, acceleration.
None really. I don't care about features in the car only the way it drives!! If you care about that, go buy a Lexus or an Acura.