The guys from HardOCP have published a big processor cooler roundup. They've taken a look at ten HSFs:
Anyone over the age of 21 may remember a time of "true" silent computing. I say 'true' because the only need for a fan near a computer in those days was on a hot Summer day to keep you cool. CPU's would rely on nothing more than a chunk of metal to remain cool. Boy how things have changed. With the ever increasing power requirements of computers and the desire to keep them quiet, heatsink manufacturers have designed some of the most amazing cooling products ever seen. From larger fans and the inclusion of heatpipes to using water and phase change cooling, it seems there is no limit to the lengths some of us will go to for peace of mind or just that massive overclock..