I use this cooler in my server. It's alright but I'd say the newer coolers like the Noctua ones especially are superior. And of course if you want to go with a sealed water unit like a Corsair H100 or something you'll get a big boost there.
I know you said not water cooling in your original post but those integrated units from Corsair, Asetek, Coolit etc are so easy to fit and are zero maintenance they are just like using air but better.