Anyone know of good factory replacment cross drilled slotted rotors?

Rotors ARE consumables, just like brake pads, period. Cutting for the most part is just trying to stretch the life. When I was younger i used to get stuff cut, but the second life really isn't nearly as long. In my last 250,000 miles driving in 2 different cars i have replaced the rotors almost as many times as the pads.
Pick whatever you want for the car, they're all iron, pretty much...Good friction and cooling properties. I've used cheap ones, expensive ones, and fancy ones...
All with about the same result. Your pads make the biggest difference, and yes,EBCs kick ***, as well as many others.
As for bikes, unfortunately, unless you buy something performance specific, almost all your rotors are some sort of stainless, which blows... poor friction properties, and even worse thermal properties, meaning fade. All your EBC replacements are some form of carbon steel, and generally superior in performance to stock as well as many so called performance rotors (insert your fancy brand here). The only rotor I'd waste my time and money cutting anymore is something totally obsolete, like my '72 Honda CB 500 rotor ( and yes! I will have it shotgunned w/96 holes!)
Flame on!