yup, i have fitted SPAX to a few cars, they always seemed to be on the hard side. but with suspension you need to weigh up several things, how far/long do you travel in it, what is your driving style, what are your roads like etc etc...
i have G-Max springs, that came with the car - they are equally as hard, in fact running with bilstein sport shocks a bit too bouncy.
i believe Weitec are the springs to go for if you could pick anything.
hope that is of some help.
two windscreen wipers, one exhaust... surely thats the wrong way round.....