Without trying to derail the derailment too much...
Regarding the fan, I initially placed the 120mm fan directly on top of the AVR and noticed that it seemed to be only cooling the area in close proximity to the fan so I found several small rubber self adhering bumpers used on kitchen cabinets & drawers and affixed a bumper on each corner of the fan's housing which raised the housing about an 1/8" or so off of the top of the AVR, this made a huge difference with cooling because now the single fan is cooling the entire AVR as well as acting like rubber isolators keeping the noise down. Depending on the size of the cooling vents on your amp or AVR this may or may not work for some but it's certainly worth a try.
