Looks like it's doing it's job just fine. I wouldn't upgrade the cooler with that kind of performance unless you are wanting something that will carry over to another build like an i5 or an i7. Even then I'd just wait until the new build to upgrade.
Ok, last question
What about that Corsair H50? I've read mixed reviews, and have never seen the ASUS cooler I have on a reviewer's list for comparison.
Getting that would maybe allow me to water cool a graphics card down the road.