I'm planning on getting two 150GB Raptors to run in Raid 0 and have another 74GB Raptor as scratch disk with the remaining caddy for a 1TB GreenPower. I imagine the Raptors will generate a lot of heat. Upon looking in the case, there doesn't seem to be a fan blowing there or at least not perceptible to me. Is there enough cooling there? I wouldn't even know where to begin if I wanted to add an additional fan.