I'm looking into getting an Acer C720 Chromebook as a next computer.
Prices vary; I had seen less than $175, but now (late July 2014) it's running about $200.
Of particular interest is the ability of this system to run Linux. Your choices are
Of especially particular interest is Minecraft on a Chromebook. Here's a walk through of Minecraft on an Acer C720 with Crouton, which reports that "[f]ull screen with all the graphical options turned up to full, you should see around 35 frames per second rising to 50 when all the chunks have loaded."