Hi ollie,
Eibach sportline springs lower it arounf 40mm, they are perfect,
Looks good although personally if i got something inbetween stock height and that i would be happy - i would like it to be lowered but not look if it has been lowered if ya know what i mean.
Are you aware of any warranty issues - ie lack of now you have done this?
Any one got any pictures of a car lowered with -25mm springs?