So I've just done a Torture Test on Prime95 and I'm going to have a serious temp issue if I overclock this any further. I know my Arctic Freezer Pro 13 is not up to the job as per below. The temp of the CPU (TMPIN1 I think) is just around 65 after 10 mins. I need to o/c to at least 4.5/6 to reduce any potential bottleneck when my additional GTX660 arrives.
Due to the RAM I'm using not being Low Profile, I cannot use the top 3. K2, NH-D14 & TC14PE. I've been looking at the Antec Khuler 620, but I'm not sure if it's the best solution.
What could you recommend?

Due to the RAM I'm using not being Low Profile, I cannot use the top 3. K2, NH-D14 & TC14PE. I've been looking at the Antec Khuler 620, but I'm not sure if it's the best solution.
What could you recommend?