slotted rotors assist with cleaning roasted brake pad off as well as let the gases from the burning pad out instead of floating the pad off the disk. it does help when you're at the point where the friction material is being pushed past its limits.
drilled rotors assist with selling more rotors, they look awesome and they crack a lot.
EBC are a british company I think. they do various grades of pad and they colour code them. green is semi-street which is the beefiest one they do for those calipers. they go right up to metal based extreme race only pads.
My car is lighter than standard, I can get one hard stop from 140 down to 40. if I try to do the same immediately after they fade at about 80. I only run 31 inch wheels.
though the real solution is going to bigger rotors and calipers. you want the brakes of a later EFI TB42