ok so i found by using oldsmobile intrigue parts ( they made a model with 12" rotors standard) that i can up grade my rotors to 12 inch.for 150$ as opposed to zzp's 250$ will i see a big difference just from the rotor size i dont want to spend the dough to get f-body calipers and i just want to make sure if im gonna pony up the dough im gonna feel a big stopping difference..should i use semi mettalic or ceramic pads too?