Woo hoo! first post!
From my experience with 240V fans (in australia) is that they have a huge centre section (where the motor resides) and tiny fan blades.
They tend to generate much more heat than the 12V, and can make case temps jump up by a few degrees, which may not be what you want.
I have also found most of the cheaper 240V fans to be noisier unless you do go for the option of speed controllers, which just add on an unnecessary cost and effort to the system.
Not to mention that the 240V fans are generally much thicker and heavier than the 12V fans.
My 2c tho
