I've seen one other thread on this, but what I'm actually looking for is quite different. A couple of the 120 fans on my 1200...one intake and one exhaust, are giving distressing clatters and rattles, and I may take this opportunity to just replace the lot of them. What I'm actually looking for is the best cooling performance. Sound be damned. It can sound like a jet engine for all I care, so long as it gives the best cooling. As a side note, is the antec big boy the best available 200 fan for the exhaust?