Congrats on the new 997!  Actually, the amount of dust doesn't change
very much during the life of the pad once they're seated in -- maybe
about a week's worth of driving.  It depends on the pad material and how
you use your brakes.  I've used Pagid, Mintex, Jurid and a couple of
others, but I've finally settled on Ferodo.  I do the occasional track
event (DE, not racing) and find that they work reliably even when very
hot, that the wear rate is acceptable, and the brake dust minimal.  I
thought that the Pagid pads (which were OEM on my car) seemed to produce
more dust than some of the others.

--
Ed
'82 911 SC Targa