Best socket 939 upgrade to OC

Hey guys, I want to upgrade my old socket 939 with a new processor that I will OC. I have a ASUS A8n-SLI Premium that I plan on putting a HD2950 xt into and I wanted to know, which of these three processors would give me best performance OCed?

http://www.newegg.com/Product/Product.aspx?Item=N82E16819103588

http://www.newegg.com/Product/Product.aspx?Item=N82E16819103543

http://www.newegg.com/Product/Product.aspx?Item=N82E16819103053

Is there any difference between the Toledo and Manchester? Oh, and I will be putting this bad boy on it:

http://www.newegg.com/Product/Product.aspx?Item=N82E16819103053

Are there tower coolers like this that are better? Please do not suggest RAM or Power Supply upgrades, I have very good of both and I know for a fact that they are good enough, but if you need to know what RAM it is for my OC; it's this right here:
http://www.newegg.com/Product/Product.aspx?Item=N82E16820227210

Should I run Ram and FSB at a 1:1 ratio or a 1:2 ratio? Many thanks!
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More about best socket upgrade
  1. You can't go wrong with an Opty 165. 2.7ghz easy plus 1mb cache. I see the price has gone up from $95 to $109. Out of stock even. Might be gone for good.
  2. well firstly what kind of dividers does your motherboard have. the best thing to do is find out your memorys max clocks at the timings you want, then use the divider that gets you closest to that.

    as for the cpu id go for the opteron, and if you can go with the 170 because of the higher 10x multiplyer, it wont stress your system bus as much. i have my 170 @ 2.8ghz w/ 1.425v. from what ive been reading and many others have experenced the new steppings are very good overclockers and newegg has been shipping good steppings.

    thats my 2 cents
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