I am not sure where the Cracking rumor comes from. When I was a mehanic we installed drilled rotors on some squads and never had an issue with cracking. My daily Talon has the immitation Brembo's from Ebay, both drilled and slotted and they have not cracked after 3 years. No real warping either. I use full metallic Pads so you would expect the rotors to take a beating.
I currently have been looking for a new set of rotors for the GSX swap on my 97 Eclipse project car. I really was looking at ebay cheap ones till i eventually upgrade to a powerslot big brake kit but I dont know. Cant make up my mind either.