The 150MPH top speed with optional sport package I believe is incorrect. On the X3 forum, someone has commented saying they maxed their X3 xDrive35i with SAP and found it was electronically limited at 130MPH.
2006 BMW E60 520d SE 6MT
2009 BMW E90-LCI 330d SE 6MT
Current: 2012 F30 328i Luxury 8AT
2015 Audi A6 Avant Ultra, Black Edition (sorry!)