All coilovers adjust their ride height via a threaded shock body or sleeve. It's not something you want to mess with after you have your alignment set and ideally the car corner balanced. On the other hand, Ride stiffness is easy to adjust on an adjustable coilover. You would be surprised at the smooth ride quality with some coilovers.
'13 M3 - Silverstone II - Sold
'04 M3 - Jet Black - BBS E88, KW Clubsports