From what you TM-ers say I'm leaning towards the Dunlop which, as well as published stats being good, seem to be the choice most cited.
I'm not likely to take part in track days (old age) but I do want to stick to the road in most conditions. I usually take the car to France several times each year, so I sometimes have to drive a good few miles without waiting for perfect weather.
Thanks for the help folks.