Our review on the Corsair H50 showed that it was just a tab better than the V8 in load temps and hotter at idle temps - http://www.legitreviews.com/article/1025/1/
Don't think it would be worth changing from the V8 unless you want to by the H50 and a pair of fans for a push/pull fan config like we did in that article.
Intel Core i7-980X Six-Core Processor Extreme Edition Review
Re: Intel Core i7-980X Six-Core Processor Extreme Edition Review
Nah, it sounds like wouldn't really be much better, there risk of leaks, plus in my case I have the airflow going from front to back of the case so I'd have to redo all my other fans as well.