Slotted rotors don't really do much of anything with the stock brake system aside from look nifty from behind your wheels. If your rotors need to be replaced you might as well go with plain old Brembo replacement rotors that are available from tirerack.com for pretty cheap.

Unfortunately pretty much any performance pad is going to dust a pretty decent amount. AEM pads are pretty low dust but they're not going to provide you with the same stopping power as the Porterfields. You might want to try out Hawk HPS--they're more of a performance pad than AEM and are pretty reasonable in the amount of dust they make. And yup, tirerack.com has pretty nice prices on Hawk pads.