I've always been used to plain round common or garden variety rotors
I did try the saw tooth design edge but it squealed like a pig getting killed,when i went back to round the noise stopped :?
Could of course just be my set up as these types are used with many systems ,and without any problems
To me ,the more metal in contact between the pads will do more for stopping power more than anything else [IMHO]
So fancy rotors with more holes,fancy edge etc might not be such a good thing