[...] I don't think I've ever really got it near the limit of the CS3s and that's with 200 horses.
The point PMKeates brought up though isn't related to traction caning it round a roundabout or something, it's about stopping distance in emergencies, something any car can be subject to, regardless of power.
If someone pulls out on you whilst you're doing 40mph, whether your car has 50BHP or 500BHP is irrelevant.