i have heard the c-8 ltd and have bought a pair to replace my p-10s'.they are,the c-8 ltd,the best speaker i have heard to date.better then my p-10s by far. i have not heard the c-10 ltd but if it is not too much for my room and better then the c-8 ltd i might go that route instead of the 8 ltd. the c-8 ltd,right out of the box,impresses me more then the c-40 did last year right out of the box.the new bass enclosure really tightens up the bass with the new woofers.the concentric ribbon tweeter/midrange is spectacular.hearing them being powered by a goldmund 29m amp,which i also hope to buy,was a match made in heaven.i listened for 3 days and every day things just got better and better.these speakers are going to make everyone who hears them reconsider their votes for 'best of the best'.