I'm planning on going with steel, however if by some miracle the carbon fiber constraints are lifted when my allocation comes up, I just might spring for everything, including Carbon Ceramics.
Mostly because this car is the last of its kind, a big V8 sedan with a manual and part of me just wants to get it in the highest performance spec possible which includes brakes and carbon packages. If the carbon packages are still on constraint I will opt for steels, simply because I don't think spending 10% of the cost of the car is worth it on a vehicle like this and I just feel the ceramics should only be considered if your going all out with the carbon packages, to me it just makes sense in that regard (to have the ultimate spec, show car etc).
Ceramics these days end up being a choice for many people for a purely street driven car. They can provide better front end feedback due to the weight savings which is great on a spirited drive, they look better and they stay clean. They will also, for most people, last the life of the vehicle, assuming you won't put 100k on the odometer.
Ceramics are often cited for track work, but are not realistic due to their replacement costs. They don't stop any better then steels but they do not fade so you can run lap after lap without worrying about cooking them compared to steels. This is great for a track rat who just wants to go, but due to their cost are not ideal. I'd think if cost was no object you wouldn't be tracking a 4100 pound sedan, you'd go take out an actual track car so therefore if you are going to track your Blackwing, do not option ceramics. If your car will be street driven and only wrack up maybe 5k a miles a year and you like the idea of having a nice and clean car, maybe consider the ceramics if the 9-10k doesn't scare you.