I have been running the GS5 pads for the street and use EBC Yellowstuff on the track. I don't have anything bad to say about them and would definitely recommend the GranSport pads. I have a blower and drive my car hard and never had to worry about stops like I did with the stock pads. I think I killed those about a week into owning a car with a blower, lol!
I did notice that they dust up but clean easily with just regualr car wash soap and a brush. Then again I am not religious about cleaning my car. If you clean your car once a week, you will probably see little to no dust. If you are like me and do it once a month, then I think no matter what poad you choose, there will be dust.