No more directional than any other 6.5" out to date - directivity is more of a function of frequency and cone size than the actual driver itself.
Soundillusions.net! Hrmph.
They are in desgining - personally with the choices as they sit today (8 ohm extremis vs. 2 ohm xxx) - I'd not hesitate and get a set of XXX's immediately. Eventually you'll see car-related components with the extremis 4 ohm driver involved, but that's a ways down the road AFAIK - primary focus for now is getting the sub lines out.