For what it's worth...
There are 3 really good dealers in Nor Cal. San Jose BMW (Ben McLean), Ozzie's in Chico (Lilly), and A&S BMW in Roseville (Joe Meyers). All of these guys are good to work with, but you need to do some homework if you want the best deal. Keep in mind that wherever you buy is where you are most likely to get the maintenance done, so Ozzie's would be the closest for you.
Having said that, I was only able to negotiate about $1,000 off of the price OTD and I consider myself a professional at this game... There's just not a whole lot of margin on these bikes as there are in cars. It's all about the volume of vehicles sold.
Best of luck!