Something you 2 might be interested in. SpeedFan is a windows app that will allow you to set the fan speed to a higher degree then the auto gaurdian in the BIOS. Mine now turns it's main fan completly off when it's not needed, and will kick in at full speed if the processor gets near 72 C. Between there, it spins it at a variable rate, and I also have it set to kick in if the case warms up too much.

Setup info for the SS51 is here

Now if only I could get the power supply fan to be a bit more quiet. The SS51 is nice for the size, but the noise is annoyning. I'd like to keep it up on my desk like the G4 Cube, but it may end up going near the floor to reduce the noise I notice.