Kenny,
I have almost the exact same handling mods as the ones you plan to fit and my car was 333bhp when mapped so am about the same sort of power level you are looking at. I use the car for road use so don't have any issues with brake fade on the track etc.
I have Tarox sport Japan slotted and drilled discs with Mintex extreme pads on the front and standard brakes on the rear. I've found them excellent for road use, if you intend taking it on the track you may have to spend a bit more though.
I've heard good thing about both your options but I think AP's reputation speaks for itself.