I have the HK AVR520 and the PA2000. My entertainment center does not allow for very good ventilation of the components and I’m concerned about heat! The PA2000 runs cold so I’m not worried about that. The AVR520 gets a little toasty though. Does anyone have any recommendations? I was thinking about adding a fan on the back of the entertainment center. I’ve already removed the glass door, which helps a little, but not much. I’m a little worried about the noise level of the fan though, perhaps someone knows of an almost silent running fan? Thanks for you input!