I have a spec clutch (335i) and am very happy with it.
not sure if they do one for the 330d though (US outfit)
http://www.specclutch.com/
__________________
Car: e91 330d with Viezu map
Gone but not forgotten: 2010 Jaguar XFR (Cat-back exhaust, pulley, intake mods and map), Highly Modified E90 335i LCI M Sport Manual (circa 480BHP/500lb ft)