<< If you plan on overcloclocking, They will all hit about the same speed, but the advantage of the new 700 is that it's cheaper and you can get your fsb up to 150 Mhz, which will also give you a system boost. Yes you can get the 933 up to a 150 FSB but are willing to spend that much more on something that will do the same thing as a much cheaper CPU. With using just air cooling you most likely will not be able to get to a 150 Mhz FSB with the 800 and 850. So if it was me I would go with the 700. But it's all how you want to spend you money, and I am sure that someone else here will have a different opinion. >>
Fingers answered your question. If you don't plan to overclock, get the 8xx. Pretty simple really.