This input is helpful, thanks. I'm only looking at the lowering springs though not the coilovers.
I'm not really looking at the springs from a performance point of view just an aesthetic. I want to add 10mm spacers all round once lowered to improve the over all stance. There isn't that big of a price difference between the three, I think a £10 gap between each on DPM. Might just bit the bullet and go for the KW's.