Vandersteen 5a carbon vs 5a


Is the 5a carbon worth the $10,000 more than the 5a? If you have compared both I would love your opinion and why you came to that conclusion. 
tooth2th
I heard the Quatro CT and the 5a C this spring. That tweeter really is special. The mid-range on the 5AC was also very grain free and lovely. I too have been tempted by the bird's eye maple pair. 
Does anyone know for sure that all the drivers are replaced during an upgrade? I know the tweeter and mid-range are, but I'm curious if the factory replaces all drive units.