i agree w/ bonkers...we are some of the very few who got their 700e to 1.1 GHz (mine only hits 1092 mHz, but i figure thats colse enough to round up to 1 GHz

).  but my point with that statement wasnt to lay down a guaranteed speed.  it was just to show how air cooling is sufficient for me.
OUCH, it takes 1.9v to hit 1.1 GHz, but i can leave the voltage at 1.7v (default for the cC0) while running @ 1050 mHz and my system is completely stable.
peemo, its like i said b4, OCing is gambling...its the luck of the chip (unless you get a pretested CPU that you know will hit a certain speed), which is why your question about top speeds is extremely hard to answer.  let me say this...i've heard many many stories of people getting their 700e's to 1 GHz or higher.  i have also heard many stories of people being disappointed b/c their 700e would only do 980 mHz or 933 mHz.  and i have yet heard other stories of those who cant get their 700e's to 933 mHz, or even 866 mHz.  so its like i said, its the luck of the chip.  if you would like, there is a website (i think its overclockers.com...i dont know, i've never been there) that has tables of statistical OCs.  the most common for the 700e is 933 mHz if that helps any.  i dont know about the 800e's and 850's.  now starting with a higher CPU and OCing a little is fairly successful w/ AMD Thunderbirds from the stories i hear.  you'll notice people OCing their T-bird 1 GHz to 1.2 GHz no problem, but i dont hear or see the same success stories about pentium CPUs.  and i wouldnt be so quick to say that a large OC would raise AGP performance.  just like the PCI bus defaulting @ 33 mHz, that AGP can only handle so much over 66 mHz before it or its card can no longer handle the OCed bus speed.  but yes, if you got a higer CPU and OCed a little, you wouldnt run into this problem.