Check out Frostytech's top "5" heatsinks. I picked up the Tuniq Tower 120 Extreme for my recent build, as it was offered a good blend of performance and low noise. And it was one of the few that would fit in my narrow full tower.
If you have the room (and an HAF 922 should) and cash, the Noctua NH-D14 is frequently recommended. If you don't want to spend that much, the Hyper 212+ is recommended for a budget HSF. It's currently $50 at newegg, which isn't a great deal (you might as well step up to a $60-70 cooler at that price). Last I checked, it was $30 at amazon and tigerdirect.