No need to feel lucky, just need to not feel paranoid. Are you paranoid that Toyota and Lexus will have their steering fail during operation? Hundreds of thousands of them were recalled due to this very problem...willing to bet they fixed it on the new models?
My brother-in-law has been running a Battlestar Galactica marathon on BluRay. I will run the next session without a fan and then touch the top of the 3010 after 4 hours. 4 hours of high volume 9.2 action should satisfy you temperature wise, yes? I already did it after 1 hour and the top of the 3010 was what I would describe as "cozy warm"...this is the level of heat that feels nice after being outside on a cold, winter day in Pennsylvania. The two internal fans never kicked on (or if they did they are super quiet).
Remember to always have adequate ventillation space. When Onkyo says they need 8 inches of side and top clearance and 4 inches of rear clearance, that means do not put it in a space with less clearance than that (as an aside, the new Denon 4250 says it requires an entire FOOT of empty space around it).