Firstly, I use original BMW parts whenever reasonable pricing is available.

Going with BMW original brakes is a nice safe bet for him but not necessarily optimal for you. For one thing you are paying a significant premium over very good aftermarket options.

At this point I use mostly Bosch and ATE pads on all of my vehicles. I like the way they bite and have a reasonable life span. Dust is about average (and at any rate I don't think dust should be a major factor in your decision making on a safety item). These pads wear evenly and I can reuse the rotors without first having to resurface them. Every one on this board is likely to have their preferences and reading as many as you can, then make up your mind is a good strategy.

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2003 4.4i black ext./black int./black headliner (kid's runabout)
2014 535d X-drive, M package, silver/black interior

Sold but not forgotten:
2009 E70 35d, black ext./black int./black headliner (sold 2021)
2006 4.8iS Le Mans blue/cream int./black headliner, SOLD in 2012 sadly...

Other hardware:
2015 Cayenne S (wife's new DD and definitely wroooommmmm)
2016 Tundra 1794 edition crew cab, luxo hauler
2005 Tundra crew cab, weekend hauler. Sold after 150k very happy miles.