Just a quick update re the Avon ZZ3s - albeit they are on 17s so are unlikely to be a very popular choice . Previously had Bridgestone 050As on 18s. They were very competent. I could not really find anything to complain about with them but they just did not give me the feel I was looking for - hard to define what was missing.
Anyway, switched to ZZ3s on 17s and - provided the weather is warm enough - and/or they are warm enough then they are exactly what I had hoped for - plenty of grip and feel, no tramlining (presumably because of the tread pattern) and good ride quality. I have no evidence of this but Avons I have had on previous cars tend to wear quickly so I am expecting the same with these. I also find that the disparity between what they are like warm vs cold is considerable - they feel pretty hard when cold - this is probably to do with the compound because pressures would obviously increase as they heat up. However, I use winter tyres when appropriate.
If I went back to 18s I would now choose MPSS, I think.