One more to add to the list-
Shawn Motors in Costa Mesa (250 briggs ave.)
This is a little known shop and i've gone through hell and back with them rebuilding my car from totaled (pulled engine and a rebuilt frame rail) to 100% functional but I trust them with my 3er. Pretty reasonable pricing if you know how to talk shop with them and haggle too.
'07 E92 335i 6MT
Full Bolt On's, Vargas Stage 2's, Carbon Fiber, and Methanol.