Hi and welcome to the CCF. I had the same issues when I purchased my C6. The brake dust was brutal.
I replaced my original pads with GM ceramics, and the dust was cut down at least 95% from the originals.
The Ceramics didn't reduce my braking power, but I don't track the car, so it's not like I'm braking heavy for long periods.
My car has over 100,000 Km's on those ceramics, and still lot's of pad remaining.
My car is iused as a road trip vehicle, so lot's of highway driving, with not much braking.
Good Luck with your decision.