You won't get your answer in this thread...you need to read many, many threads to know what the truth is.
I'll give you a hint. OE is in my opinion the best for the range of conditions your car will experience. It's not only the safe choice, but it's the safest choice.
You don't care about brake dust unless you're bothered more about appearance than stopping, and it's exactly the same with rotors. They're not on the car as a decoration, they're fn brakes...for, you know, stopping.
Brakes...for stopping. We don't care about dust or looking cool, we wants our bmws! OE. Face Munich, apologize for your thoughts...make roundel on forehead with brake anti-squel...you'll be fine!