The Zotac ZBOX CI540 Nano is a bit more powerful than your average Bay Trail based mini-PC, it sports a Haswell based dual core i5-4210Y which runs between 1.5-1.9GHz and has Intel's HD4200 onboard.  This won't play AC:Unity but comes close to matching a NUC containing a Core i5-4250U, you give up a bit of horsepower for completely silent operation and for media it sports enough power to watch your favourite videos.  As you look at Silent PC Reviews' article you can see the honeycomb patterned knockouts on the casing to allow heat to dissipate and to let in liquid if you don't put some thought into where you are going to place the ZBOX.  It does have Bluetooth and there is an unofficial optional IR receiver that can be used to make it easy to place this tiny computer in a safe place.

"The Zotac ZBOX CI540 Nano gives up a little CPU/GPU horsepower to deliver a completely fanless, silent and full-featured mini-PC experience."

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