I saved a few bucks and ordered my Q6600 OEM because I was getting the Thermalright Ultra 120 Extreme and a Scythe S-FLEX SFF21F 120mm Fan (two of the best cooling products I found). I also located this article
on Intel stock coolers which you might want to read.
There is a reason why reputable articles always have dates on them.
That article was written by a frequenter here. He wrote it before the core2s were released. It does not apply to the hsf for core2 chips.