Has anyone in the so cal area installed oem sirius into their car? if so how much did you pay, i got a quote from a dealer for $950? my car is already pre-wired..

Take a look at this thread:
http://forums.e60.net/index.php?showtopic=6396

It's from January 2005 when BMW finally allowed those of us with pre-wiring to get Sirius. By now, the prices should either be similar or lower, in my opinion...