Whats the ride like on the FSD's/eibach's?
Is it much harder than standard?
....Absolutely not any harder.
A mate of mine, Jason (he's registered here but doesn't have much time to post) had them and I drove his car and mine back-to-back on the same bit of roughest road we could find and I'd say that the ride is better with the FSD's - They take the edge off on the rougher stuff and go stiffer on the smooth surfaces. As a result I bought some.
It's subtle but good. I think that some of the Mercedes use them oem.
They
WON'T give you that low stance though because there must be room for travel for the system to work. It's a compromise but a good one, but biassed towards road rather than track use.
HTH