Hey david,
I'm willing to do a test for you on my E8500 today...got nothing better to do and would like to check out how far i can push the cpu anyway...
Just so you know, i've currently got my E8500 OC'd to 3.4ghz, with stock fan, and I hope to add an OCZ Vendetta 2 in a couple weeks, so I should be able to update the test in this thread! I will try for 4.0, maybe 4.2 down the road.
Will post more in a while...
Oh, and this thread will be moved to tech section in ...3......2.......1.......
p.s. The E8400 is only $25 cheaper, and for the extra 1.6ghz, you definately want the E8500....I regret not spending the extra $90 on the E8600.