The fluid and filter changes you should definitely at least do yourself. Super easy and would save you a few hundred. Brakes are a bit more involved but not bad at all. We have a lot of good DIYs on all of the above.
If you are desperate to pay someone else to do it, the BMWCCA usually has a fairly good repository of reputable indy shops. In your case, looks like Trackstar Racing?
http://www.bmwccaclubracing.com/Info...fiedShops.aspx