I think the jbl studio 530 and buchardt s400 are waiting to be reviewed.
next
I looked up the specs on the Buchardt s400. Looks appealing, certainly, at first glance.
I caught this bit (in this link):
Through our Constant Directivity Control waveguide! Ok, so maybe the solution isn't that simple. The design itself is the result of a couple very smart people, a number of prototypes, and a super expensive holographic nearfield scanner that we were lucky enough to have access to. This scanner measures 5,402 points around the speaker, this allows us to know exactly how the speaker behave from all possible angles.
Sound familiar? You have to wonder if that's the Klippel NFS they're talking about.
At any rate, I'd personally like to dig in to this design myself. Looks like they're using the SB acoustics driver (same for some of the Revel models) for the woofer.