Yeah I had Eibach springs fitted for over a year with various different wheel sizes (16,17 +18")
They are really good value for money tighening up the handling very well eliminating what little roll there was
The ride will depend on what wheel + tyre setup you have really.... even with the 17" S-Lites and runflats I thought it was firm but still acceptable, if your running non-runflats I think you will hardly notice much difference in the ride.
IMO the Eibach's are probably a bit too stiff on the front as I'm now running coilovers and the ride is fantastic better still even though its lower, but with coilover's full suspension travel is still maintained absorbing more impact.
So really depends on how much you want to spend, certainly changing the shocks will have a benefit because they are designed to run at a lower ride height compared to a std shock + Eibach spring fitted which is limiting suspension travel thus not absorbing impact as much.
Hope all that made sense
Chris
