Nice use of reliability "bathtub" curves as they are called - nice comments on how the warranty is determined. I took two classes on this subject from an 80 year old turkish dude, reading it almost brought back bad memories of boredom.
I would probably consider the E8400 as more of a sweet spot for overclocking (based off what I've read) than the E8500. Lower price and clocks within a few percent of the more expensive E8500