I have been through Brembo, Project Mu, Endless, etc...
My best sets where Brembo and Endless. They make both kits for the E92 M3.
Alcon are ok. Been there done that....
Like most said if you daily drive then OEM are great and will suffice. Track or weekend SCCA...Endless or Brembo and be done with it.
If you are on a budget look at Stoptech. Another outstanding kit and best bang for the buck in my opinion.
Here you go.
http://www.endlessdata.info/European...e%20System.pdf