I've been using Hawk Pads for years and recommend nothing else. You will not have any problems with cracked rotors with Hawk HPS or HP+ pads. The blues are the ones to watch out for but that is a track only pad. I just put a set of HP+ pads and PowerSlot rotors on my STi yesterday for an upcomoing track day and it's stops like a totally different car.

DO NOT waste your money on any of the EBC pads, green or red, they both suck and fall apart.

Also, stay away from cross drilled rotors. Just get the slotted ones if you must. X-drilled will crack more easily as someone has already mentioned.