Hi; it's warm in summer here and I like to keep the fan "installed"  
on the Qube 2; but the stock one is doesn't get any quieter.
There are a couple web pages with suggestions for Pabst fans etc but  
they aren't cheap.
I saw this post  from  Debian/MIPS list:

http://mailgate.dada.net/linux/linux.debian.ports.mips/msg12298.html

and the fan he mentions is on ebay for a reasonably good price:

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=270132826600

14dBA sounds like a nice change.  It's on the way.

Brian