I run the flame rotors 180 front 160 back, they work really well. I found them much more powerful than the standard shimano ones my brakes used to have (slx). I put the extra power down to the aggressive cuts on the rotor keeping the pads clean and providing more edges to cut into the pad.
I get a little brake judder at very slow speeds but nothing that bothers me, and thats with the superstar sintered pads.
They are light too, although are less robust than some heaver offeings . I tweaked a red one somehow but sorted it with an adjustable spanner in a few mins.
I have also tried one of the wave rotors, it looks like the old Hayes 9 rotors. It was much heavier than the flames and didn't work as well in dry and mud