Originally Posted by Dinan_M5
He's saying that they aren't good enough for this price range. I agree and disagree. For the average user the dual piston front and single piston rear floating calipers (the brakes on the current model M5) have more than sufficient braking capability. For the motorsport enthusiast however a fixed caliper / floating rotor set up is in check.
It's not just braking capability, but that's certainly part of it, although a single piston floater can easily provide more torque than a multipiston fixed. The only advantage floating calipers have is price. For a car that costs 100 grand, saving a thousand bucks on calipers is pathetic.