Jmke from Madshrimps must have been quite busy the last couple of weeks. He just published a huge roundup at Madshrimps in which he compares the performance of 30 processor coolers!
"In this large group test we compare over 30 CPU heatsinks with different fan speeds, giving you the data on both thermal and decibel performance. Want to upgrade your stock cooler? This roundup will help you out."