The loudest things in my case now are the HDs and powersupply (only psu when comp is hot from 6+ hours of encoding, like now
). I'm not sure which way the zalman fan blows, but either way it should be good - either blow hot air out of side vent, or suck cool air in. The SLK-948u is similar to the xp-120 I've got, so you can have the fan blowing whichever way you like. So it'd be a good one to get imho.