Curiosity question: When under normal use (i.e. just turned on, not doing any heavy processing) is the retina iMac with SSD supposed to be *dead* quiet? See, I was thinking that once I went all solid state, the only fan necessary in the thing is to cool the processor when it's under load, and yet, I hear a fan whirring away in there the minute I turn it on, and I'm not sure if I need to adjust my expectations, or there's an issue. To be sure, it's a lot quieter than any other computer I've ever used, but in my quiet office, I can definitely hear a fan on all the time, even when it's just sitting there with the screen blanked, doing nothing. Someone tell me I'm being silly so I stop contemplating I need to return it.