*Not streamers. USB only*
Cheapest ones are some with Boxchip F10 chipset (or Sochip 9800 or whatever, the same chip with different name) ~40$. These play 99% of mkv videos nicely, but the remote doesn't have good range. I have 2 of these, they are very portable, silent, cold and cheap . Look for "1080p media player" on ebay, most say in the specs they play mkv and "bitrate up to 80mbps".http://www.ebay.com/itm/Mini-SD-USB-...ht_4849wt_1074
Next are Realtek 1055 based, more reliable, ~60$, for examplehttp://www.amazon.com/OPLAY_MINI-1A-...1278116&sr=8-1
If you search a little you can find one with DTS-HDMA passthrough if you're interested in that.