W12X i would highly suggest going through Advantage BMW on San Jacinto (downtown)...I have been dealing with Ken and he has been fabulous. If you have any other questions regarding them PM and I can help you out.
2008 E92 M3
-Apline White-Fox Novillo Extended Leather, CL Trim
-Premium Package-Technology Package-CW Package
-M Audio with Enhanced Bass-I-pod/USB adapter
-19" Wheels-Rear Sunshade