Yes you are now the 2nd person to mention these devices to me. I think the Pi is a bit too basic and sluggish and I like how it works on Windows 8. I am also about to get a couple of 4K tellies so my concern is can current devices power a 4K device?
Acer Revo L80 here, streaming from a HP micro server, full MKV rips of blu rays work brilliantly. Near silent, deff never hear it with the volume on at all, openelec running...perfik!