I believe the 7Cs will be available in April. Although the driver complement looks similar (tweeter, midrange and 2 7" woofers), I believe they are new drivers. I would guess, based on the fewer number of finishes available on the 5B and Model 6, that we will be seeing new models to replace these as well.
Samski, I am curious to learn what electronics you are using with your Aerial 7Bs....