My girlfriend has a 17" iMac and i was very impressed at how quiet they are - so my question is; how quiet are the powermacs and what kind of cooling do they use? I only have an iBook y'see. I'm currently in the process of getting my pc silent; currently using a 23dB(a) PSU, Zalman case fans (20dB(A)) with a zalman flower cpu cooling unit on the way (see attatched). I am thinking about saving towards a pmac as i'm beginning to despise my wintel machine (although i'm going to explore using linux or some flavour on it. I installed Mandrake a while back but didnt really like it). Having a quiet, if not silent, machine is an important factor and the datasheets on the apple site dont really give any indication!