I've used the cheapest celeron nuc for this. Has built in IR, just add a usb drive / laptop drive and memory. Not much more expensive than a dedicated box here in Aus, and much faster.
It's worth noting the Intel Next Unit of Computing (NUC) units only do HDMI 1.4a, which can only do 1080p (not 4K). The newer (4th gen/Haswell, 5th gen/Broadwell, 6th gen/Skylake) units can do 4K output over DisplayPort 1.2. They're also pricier (IIRC, they're kits, and Wi-Fi, SSD/HDD, and OS all have to be purchased separately).
At this price point you'd probably be better served by an Intel Compute Stick, although the current ones only do 1080p HDMI 1.4a output. Rumor is that the next generation ones might do 4K though.
At this price point you'd probably be better served by an Intel Compute Stick, although the current ones only do 1080p HDMI 1.4a output. Rumor is that the next generation ones might do 4K though.