You can probably dial the Koni Sport's rebound adjustment into tune with the set rebound of the front B8s without too much effort.
I have no idea of just how different their set
compression settings are though.
I am just going to go with the Sports front and back, as the B8s are twin tube anyway (correct? I know the B14s are), I WANT the rebound adjustment, any Bilstein HDs I've ever owned raised the car UP in ride height given the same spring height, and I've had nothing but GREAT experiences with the Konis as far as longevity, durability, and even in the rare case of something going wrong, their customer service.