I'm about to upgrade from i7 950 to the i5 3570K. Just wondered if i'd be better off saving the £50+ from the NH-D14 and keeping my H70 or if I would get a noticeable difference from the Noctua. Obviously I'll be overclocking so that plays into effect. I have the CM HAF X and don't plan on changing it but I think I'm right in guessing that my case would provide better air flow with the NH than it would with the H70.