If I was going to buy street pads for my Boxster I would probably buy the Centric Posi-quiet Premium with shims (which I believe means come with the brake hardware too like it did on my son's Miata). It comes in several formulas, Ceramic, Semi-Metallic, and "OEM" formula. My son has used them on his Miata and we have been very happy. He also used them on a track day and used about half of the fronts in one weekend
He is now running some EBC Yellow that his instructor gave him last September at that track weekend, man those things are dusty
I am running EBC RedStuff on my Boxster which is mostly HPDE and Autocross now and they have been great, but they are also "street friendly" too. They are low dust, but you still get low dust on the track. Not nearly as much as the Yellow stuff which is more track/race oriented.