I replaced my loud computer fans on my AVR and Pro Amp with these larger blade models from Monoprice and have been very happy with them. They run nice and quite, and move good air. No overheating issues. There are other modles that cost more and may work much better, but for the price this was hard to beat.

Panny 3000 PJ, 118" Carada, Denon 3300, PS3, Axiom QS8, PSB 5T, B&W sub, levitating speaker wire