OK fitted the rear springs today, sitting much lower and the fronts seem to have settled a bit too.
One of the rear shock/spring assemblies was interesting, someone had replaced with a standard vectra spring and assembled the parts in the wrong order-the clunking noise I had is now gone.
anyway, without sounding like I'm on commission I'd recommend these springs-much smoother for 'normal' driving and seem pretty good when hustling along backroads too.