"I would also prefer slotted, as it should actually dispel gases that are trapped between the rotor and the pad surface that hinder breaking. This is the true reason for slotted/cross drilled"
This is not true anymore...Brake pad friction material used to (like in the 50's) emit gas when it got too hot, and this gas used to push back against the pads, decreasing stopping power. This was known as "greenfade". Modern friction materials do not do this. Slotting/Drilling don't make HUGE differences in performance. Slotting supposedly helps remove glaze from the pads, while crossdrilling is supposed to do the same, as well as make a lighter rotor. But, drilled rotors often times develop stress cracks at the holes. Just ask Porsche. They have had problems with cracks in their drilled rotors in the past.
I've also heard really good things about cryo-treated rotors.
