MadManOriginal wrote:So instead of just blindly jumping in with an opinion, I carefully read the OP's posts and followups. The truth is that at basic task low load scenarios, aftermarket coolers won't really be quieter than the stock Intel cooler. Even at full speed stock Intel coolers aren't incredibly loud, and at low load or idle with proper PWM control they are actually pretty quiet. Therefore, for the specific reason the OP stated "I'm looking for very quiet operation while doing ordinary office tasks (word processing, email, etc.)" I would recommend not spending money on an aftermarket cooler. An aftermarket cooler is warranted for overclocking, quieter operation at high load, or extreme silencing.
If the OP falls into the last category, fair enough, but I would also recommend looking at all the fans in your case first, including the GPU and PSU fans. It could be that the other fans are what bother you at low load, and if you are going for extreme silence you will likely want to get quiet case fans as well, either low-moderate (~1000 RPM max) fixed speed or speed-controlled.