I bought my rotors from a local shop and was going to drill them out but decided against it (i burnt up my drill press the week before on another project =D )
I didn't feel like burning up a hand drill so.
Anywho, first hard stop and now there wrapped and wobble a bit around 50 again >;(
Cross drilled Rotors will resist warping because they cool much faster than solid rotors. I've personally boiled my break fluid on my car and its never seen the track so it wouldn't hurt to get those rotors just ensure to buy new pads or your going to have a rough ride.