I like my GSkill PC2-8000. They're running at 1066 5-5-5-15 right now. For some quality cooling check out a Vendetta 2, Xigmatek S1283 (Either with a bolt through kit) or perhaps a TRUE-120. They're all around the top for cooling, even though the TRUE can get a bit pricy. With any of those I'd guess you should be able to get around 4.0GHz
__________________ MacBook Air 13" (2011) | Blackberry Bold 9900 A Veteran, whether Regular Force, Reserve or Retired- is someone who, at one point in their life, wrote a blank cheque made payable to the Dominion of Canada for an amount of "Up to and including my life" -Author Unknown |