I've run drilled for around 10 years, you get small cracking radiating out from the holes, but no issues, only had one crack open about 1mm, also had 1 disc break away from the bell part that was not grooved or drilled.
I'd go for a combo, dimpled(not drilled) and grooved, and ebc yellowstuff pads, work from granny wagon from stone cold to chav racer high temps.
tabetha