I'd go with either the Twin Frozr or the new Sapphire Dual-X .
Both are great overclockers and have identically good coolers, it's a matter of which company he is more comfortable with MSI or Sapphire.
http://www.newegg.com/Product/Product.aspx?Item=N82E16814127667
http://www.newegg.com/Product/Product.aspx?Item=N82E16814202026
well he knows im all with msi so all have him go msi thanks