OC9 is up to mkIII version which I believe is actually less sophisticated than mkII but has a somewhat less 'explicit' treble. MKIIIs are available direct from Japan via a well known auction site for around £360. I could stretch to that but from what I am reading a dynavector 10x5 is very popular at this price point and I could have this demoed and fitted by another local dealer. Ah the agony of choice!