I just finished reading a review on 3dGuru about a new water cooled system that costs $79. Take a look here: http://www.guru3d.com/article/coolit...o-alc-review/1
The beauty of this system (from the article, I've not bought one..yet) is that you are getting a low cost, low decibel and pretty efficient solution. The system is self contained and the install is not too painful. This sounds like a great solution for those who build their own systems and want to keep things quiet for DAW use.