Hi 'Mic:

 I couldn't have put it better myself.  The bass unit is very special indeed and does things that I've never heard from any other speaker. However, the lack of very low bass frequencies was something I eventually could not live with.  The HF driver does seem to have a problem that I never did fully fathom - a very slight and unobtrusive, but pervasive, colouration.

I am extremely pleased with the ATC anniversaries and they are (definitely) the best speakers I have ever had. Again, not perfection, but I'm currently more than happy for them to be 'the last speakers I will ever own' (perhaps!).