welshtom:
my load is after about 8 hours of encoding plus I have a 130nm fabbed CPU which requires more volts and so more heat. My CPU idles at about 34C and about 47C if Im playing CS.
If you are going to put a X1900 into the shuttle then you would probably have to place the reservoir where the CPU normally blows out, although I had difficulties trying to place it there.
As Goksly said, if you have a decent graphics card in the water loop, Im not even sure if a 120mm rad would be able to get rid of the 250W+ created at full load (FX60 + X1900XTX) if you have an internal reservoir.
If you want a quiet PC, I would just stick with a non watercooled shuttle or go for the Zalman Reserator (having that thing dwarf you shuttle would be strange).
Pics to follow tonight when I get home.