The problem with doing anything other than the 25mm or 30mm H&R DRA kit, which bolts onto the hub first and then lets you reuse your black OEM bolts on the outside of that, is that the other thinner spacers only come with silver bolts. For me BMW = Black bolts.
If it were not for that one issue, I'd have gone with 10mm to 15mm spacers on the fronts a long time ago. Right now, I only have the 25mm DRA kit on the backs. Still gots a black bolt car, phew!
Waiting for somebody to make longer black bolts so I can do the fronts too!