The Register has a few hints on how to keep your system cooling from drowning out your speakers.  2 round ups from Madshrimps, and 3 reviews of a Coolermaster heatsink.  Silent PCReview takes a look at ducting, and among other things, shows how lower rotation speeds limit suction, regardless of the CFM rating.

"If you're tired of the racket your PC is making, you have two choices before you. You can either go for a lower performance PC that will probably not provide all the latest features - or go for no compromise PC with all the latest and most powerful processor, graphics card and so on. Of course, the high performance PC will need a number of modifications to control the noise."

Here are some more Cases & Cooling reviews from around the web:

   CASES & COOLING

• Spire's CopperStream II @ dansdata
  
• Battle of the Titans III: Cooler Master Hyper6 vs SP-94 @ Madshrimps &
  
• Thermalright ALX-800 vs his big brother the SP-97 @ Madshrimps
  
• Coolmax Chameleon Fan @ HardwareHounds.com
  
• Ducted Zalman 7000CU A64 System w/Countercurrent Flow Cooling @ silentpcreview
  
• EverCool Super Silent HPB-C715 Cooler @ systemcooling
  
• Tt Extreme Giant III GPU Cooler Review
  
• Tt Mobilefan II+ @ CreativeMods.com

and a few sites looked at the CoolerMaster Hyper 6 Heatpipe

• ExtremeMHz
  
• dvhardware
  
• octools