Assymetrico's - they seemed to wander even when brand new, and have gotten worse as they (quickly) lose tread depth.
My mechanic drove it and his opinion was that the tires were 'blown inside' (i think thats what he said) and we should get them off the car ASAP.
I believe that we will have to accept a Pirelli product as part of the warrenty agreement, and i'm going to take a long look at the ATR's.

Thanks to all those who participated in this thread.