I think people are overreacting to the bad batch. I'm sure you could still hit 3.4ghz with an Xigmatek cooler with some decent temps. They aren't bad processors because they don't hit 3.6ghz like the older ones. I think Intel spoiled us, lol.
i had a VId of 1.2850 and i got to 3.6 fairly easy for a client, eneed up putting it at 3.4 stable because he wanted it soon and i didnt have time to stablilize it. any q6600 kmakes it to about 3.2 for sure.
Some people say it barely makes a difference, like not noticable some people say it makes a huge difference like up to .8ghz and say either buy an old q6600 or buy something else.
Anyway by the time i build my rig the q6600 will cost peanuts