Just so you're aware it's going to be very hard to bring the noise of you're system down to the level of the Panaflo. Make sure the rest of you're components are equally quiet; no stock video heat sinks, no chipset fans, equally quiet case fans, and a very queit PSU.
I'm not saying you shouldn?t get the Yate Loon or Nexus but housing the fan within the case is going to mask most of the nose the fan creates, which isn't much. Unless the rest of your system is very quiet the Nexus/Yate Loon would be a waste of money.