You will always get marks as soon as you press the brakes. If you fit brand new discs and pads, you need to bed the brakes in a little to get full contact across the face of the pad but that doesn't take very long. The taper is only on the leading and trailing edges and about 80%+ of the pad face is completely flat for main contact between disc and pad. I'll take a couple of pics of new genuine pads tomorrow if you like