Hum, actually...
Z4 M struts are looking pretty good for a moderately lowered car.
http://www.ajusa.com/Bilstein-35-141...ly-ab06b2.html The Z4 M PSS10 kit looks potentially usable too.
http://www.motorsport-tools.com/bils...48-141635.html For $2200, it's pretty reasonable considering the quality of shocks/struts you would be getting.
http://www.ajusa.com/Bilstein-48-141...em-ab071c.html