[C's Bimmer]

The steering is the biggest difference that can't be modified. It was the biggest complaint from F10 M5 owners (many of whom are still upset that this bug was fixed as a costly upgrade package, now called the CP. Many feel the additional upgrades were done to hide the main reason for the steering issue on non-CP models). If you can afford a car like this, I think it's a worthwhile upgrade, especially with all the other mods you're planning on doing. My 2 cents...