I prefer Noctua. They make great cpu coolers. All of their coolers are very quiet. I have a Noctua NH-U9b SE2, with 2 92mm fans (its a small cpu cooler), and its very quiet. I use a low noise adapter on it (maxes fan speed at a lower rpm), and I can run Battlefield 4 at 47-49 degrees celcius. That is great for an FX-8350 CPU running Battlefield 3. It would be even lower if I took the low noise adapter off. What will you be doing with your computer? Be Queit's Dark Rock CPU cooler as supposedly good as well. But I can personally recommend Noctua because I enjoy their products.