Just to follow up on this matter. I currently have new original springs + Bilstein after removing the Eibach springs, and before that H&R springs (both with Bilstein).
For looks it is very good but very hard over small imperfections in the road but still less fear of bottoming out at the front than I experienced with the Eibach springs. Perhaps it is something to do with the Bilsteins buildt in bumpstop?
The front is in total working better now but the rear is signifficantly less stable. With the Eibach (and H&R) it was rock stable, both on sweeping roads as well as on track.
Hence not quite happy.
I´m fond of stiff cars and to compare, I find the 2010 mod BMW 5-series M-sport I have a total bore when it comes to driver involvement but is´s very comfortable.
Alfa GT Q2 is very good except for the wheels being to heavy and tu much unsprunged weight compared to design of suspention.
The last Brera 2.4 was also very good, also was the 159 TI following facelift.
Have anyone compared Eibach with Bilstein to Eibach with Koni for behavior of the front suspension? or is the only solution to go for Intrax full adjustable (have tried Zetek on 156 GTA and found it not to my liking compared with Intrax/RSR on my 3.0 GTV 116 series)