Whilst searching for some comparisons between the H&R springs and Eibach Pro, without just having someone tell you that Coilovers are the way to go...
I can across this (link below), it is based on them being fitted and tested on a BMW, but three identical cars all tested against stock set ups.
Shows the H&R and Eibach springs to be very close, where I had read reviews of people suggesting the H&R are just rock solid and will be horrible, and the Eibach are the way to go but don't really lower the car very much.
Anyway, worth having a read if you are looking or interested:
http://www.tirerack.com/suspension/tests/eibach_hr_rd.jsp
I can across this (link below), it is based on them being fitted and tested on a BMW, but three identical cars all tested against stock set ups.
Shows the H&R and Eibach springs to be very close, where I had read reviews of people suggesting the H&R are just rock solid and will be horrible, and the Eibach are the way to go but don't really lower the car very much.
Anyway, worth having a read if you are looking or interested:
http://www.tirerack.com/suspension/tests/eibach_hr_rd.jsp