Unless you really need the cross drilled rotors, you could try switching back to solid oem types. I run the Centric rotors and pads (bought from Zeckhausen) on my '06 4.8is. They offer oem type low dust pads which are pretty good and don't dust nearly as much as stock. The rotors are good too and I've had no problems with the conbo so far after about 5k on them. Cost is reasonable too.

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'06 X5 4.8is, TiAg/black, cold weather pkg., comfort seats
'07 750Li, TiAg/black, sport pkg.
'05 Ford F350 silver met./slate gray, Lariat, 6.0 PSD, CC, DRW, FX4